I'm sorta in the same boat as you with no really good LHS. So, my online shops are pretty much the same as everyone else in this thread. There is one more that hasn't been listed so far and its,,MissionModels.com
I've noticed that they have a pretty good selection of kits and aftermarket supplies.
Paint, I use basically Tamiya and then I have others brands but the bulk of paint supply is pretty much Tamiya. I do recommend having a Humbrol Color Cross Reference Chart. THis will help you out with converting the paints that you need to complete a more accurate paint scheme.
This is all my own advice and you can take it or leave it. The only thing that matters is that you are happy with your results and you find the modelling supplies and kits you desire.
have a good one!