As for the panniers, if you get Ortlieb will need to order extra 20mm hooks instead of the standard 16mm ones. You may need to pad the 20mm ones a little bit to get a snug fit. But there are other brands that might fit as well. I got the Ortlieb roller high visibility for safety reasons. Yellow is not really my favorite color, but they really stand out.
without any adapters you can get common bags to fit. you just have to modify the clip on system slightly if your carrymore rack is like mine and it's kindof oval tubing, it's too tall for the clip in system to work without any mods on my panniers. I just took the mechanism out and sanded it down. the bags were super secure after. After I got the XLC adapter plate and pannier adapter I used that, it put the bags further back and improved my bike handling. to me it turns faster and handles more like what I'm used to on a motorcycle. Your Mileage May Vary