Ok, for the seat post suspension, which is my only rear suspension, I first tried the expensive Thudbuster as my girlfriend has one. But, the Thudbuster has a major drawback. The bracket that hooks it to your seat rail only has one bolt and it won't sty tight meaning you have to constantly tighten it down or you rock forward and back, especially if your on the heavy side like me. Isent mine back. My gf weighs just 110 and her's is working ok so far. So, I went with one that cost me 1/3 as much and has two support bolts to hole it in place and I love it. Here it is:
Amazon.com : Venzo Repacked Suspension Mountain Road Bike Bicycle Seatpost 30.9 x 350mm Suitable for Rider Weight 187-220lbs : Sports & Outdoors
www.amazon.com
Now to raise those handlebars you need get an extender and then if you want real comfort and turn that mtb into a hybrid cruiser/mtb get the Jones H bar like mine. The sway back raised double bars gives alot of easy peddling and you feel and look good going down the road. And yes, you will need to have a shop replace the rear hydraulic brake line and bleed it, to go higher with the bars. It wasn't much. I had them do the whole thing for me. Under $100.00 total. (parts extra)
jonesbikes.com
Did you order those punture proof tires yet? Hope so-tick tock -lol