You hadn't listed Ride1Up among those that you eliminated. But the Roadster is not one I suggested and doesn't sound fitting at all to your situation.I did look at the Ride1Up bikes for consideration. The one I really liked an eliminated up front was the Roadster V2 as it appears to be a belt drive single speed. Also, the battery is 36V 7.0Ah, 350W motor so I assumed it wouldn't have enough oomph for my hilly terrain and considering it doesn't have any gears for shifting - so took it off my list.
Well, that's a head scratcher. The Aventon Pace 500 is one of the bikes you're interested in, yet the bikes you looked at for Ride1Up were the Core-5 and a completely different Roadster (poor choice), when the Ride1Up bike that compares most closely is the Ride1Up 500 series. But the R1U 500 has a better PAS system, larger 13 aHr battery, and a bit higher top gear, same power of motor, same number of gears, same look, for about $245 less with the pledge vs. the PACE 500 with throttle on demand, $145 less than the PACE 500 you mentioned that doesn't have it (the R1U 500 does). The PACE has hydraulic brakes, multiple sizes, and LBS availability in your case. So, for you that makes it a closer decision. It would have been a no-brainer for me since there is no LBS in my region that has Aventon, and the one size R1U fits me well at about 6' 190 lb. for now.The other one I liked but not so much aesthetically, is the Core-5. I couldn't tell whether or not it comes with a 750W motor as stated or is a 500W motor with 750w peak. It's a 7 speed vs Aventon 8 speed with same voltage on the battery but a little less on the AH at 10.4 vs the Aventon 11Ah. It cost less and weighs less than the Aventon but again it comes back to my confusion in trying to take all of the forum input into consideration. In comparing the two, in my opinion, they are fairly close in comparison but I would in fact think the 750w motor and the lighter weight of the bike is an advantage but is the one gear in a 7 speed vs 8 speed and the 10.4Ah vs 11Ah a big enough difference specific to my needs. I ended up opting to take Ride1Up off the list and pursue the Aventon since they are pretty close in specs and is available at my LBS. I can certainly add it back to to my list if the Core-5 is in fact a 750w motor and the one off in Amp Hours and 7 speed vs 8 speed is not going to be a deal breaker for my situation and my terrain.
I ride 99% on rural roads, and I have some big hills on my routes, especially on my longer rides. I've tested the steepest one with my R1U 700, and I can climb it by shifting into 3rd gear and using 300 to 400 watts of assistance while pedaling fairly hard as well but not moving that fast. During my riding, I've yet to shift down into 1st or 2nd gear. My motor was listed as 500W sustained and 800W peak. I've actually tested it at over 900W temporarily with a 70%+ charge, but during actual normal use, I haven't topped out over around 400W climbing a hill. And I haven't tried climbing a hill without putting considerable muscle power into the equation. Now their website says, "750W Shengyi Geared Hub-Motor (500W nominal, 880W peak) for the CORE-5, 500 Series, 700 Series". So, that's 3 separate wattage ratings for one motor, and the peak is listed at 880W vs. 800W or 1000W as had been lised before, for the same motor.To clarify, I live in a rural area. I'm 5ft 4" at 150 pounds. About 50% of my riding is going to be on a paved bike path that is fairly flat. My concern with motor wattage, battery voltage and the number of gears come for the other 50% of my riding that will be on paved roads primarily flat but with some rolling hills since it is out in farm country (example picture attached). Not trying to climb hills in San Fran or ride the mountains in the Tour de France. Not using it for off roading hilly trails back in the woods. Not looking to see how fast I can go down the road. Not looking to load up on groceries or carry a bunch of gear. Simply looking for the pedal assist when I get tired or pooped out on a hill or if I'm riding into a head wind on a breezy day. I want to mostly pedal under my own power. Because I'm a newbie, I don't know what it takes to meet my needs in terms of motor size, battery wattage and the number of gears I need. And if Amp Hours relate to how far I can go on a charge, I would think I could adjust my ride accordingly based on how much or how little I'm using assist. Once I get a better understanding of that with the understanding that there a zillion variables that "could" apply, I can feel better about making an informed choice on what will best meet my needs.
Edit: Yes, you can increase your range with a given amount of battery power by using lower or no assist and using more muscle power. I do that quite a bit. My battery came charged to 51.5V, and I got 75 miles on my bike before it dropped to about 44V, when I charged it for the first time. I was riding into some very strong winds earlier this week with 60W of assistance, and it was still a chore. I think I'll bump it up a little more next time.