For that setup I think I'd get something in the 2.5-10x range. If you don't over over 10x I think I'd just pick a 44mm objective, I think they start to get pretty big once they hit 50mm, but more light is more light.
I've mostly used talley's and leupold bases/mounts, from now on I'll probably only be using talley's, unless I find something I like even more. I wouldn't bother with Quick Release mounts.