You definitely sound like you want something with reverse camber. Get about a 147-152 anything between that size should be fine. boards with RC are more playful and more your park/freestyle boards and they float great in pow because of the natural lift they have. i went from a burton operator 152 (regular camber) to a skate banana 152 (reverse camber with magnatraction) and i instantly noticed a huge difference, you can butter and spin around with not having to worry about catching an edge ( it can still happen trust me hahaha) If your going for a board that is just all around fun to ride and playful in the park and freestyle stuff, go with a RC. if your looking to bomb hills and hit fat jumps, go regular camber.
Look at lib tech stuff, Capita stuff, and a lot of people on these forums are in love with Neversummer, i've never ridden one so i cant give an opinion on them.
try to ride a few different boards if you can, and just pick your favorite, its a big person preference thing, i wasn't a big fan of capita, but i know a lot of people swear by them.