Specs: 5'6, 115lb, not very muscly at all. I prefer downriver stuff, not much for playing.
Right now, I'm without a kayak.
But in the past I've paddled a few boats. Most of them are from a few years back so you'd have to buy them used.
Dagger Mamba - its a big boat and I found it hard to maneuver. Its the boat I began in, easy enough to roll, but more importantly it was very very stable. Great for creeking. Personally I'd rather not get in it again, it swallowed me.
Wavesport X - Fantastic boat, I paddled it in Costa Rica on mostly big pushy water and some general river. Easy to manuever, kept me upright. I was only in it for a week but it was nice.
Dagger Ultrafuge? or Centrifuge I forget which - Its a nice little play boat. I had to squeeze in it though, not much leg room. Its paper-thin so easier for me to do tricks in despite my size. But i'm not much of a player. Also its fun to take down river, very sleek.
Dagger GT - by far my favorite boat. I'm looking to buy one now (7.6 if you have it!!!) The one I used was a 7.8, but I could still handle it (just a bit too big for me to play in). The handling is great, I love the outfiting, pretty fast, easy peasy to roll, and a GREAT all-rounder. the X and the GT are very similar. the GT was a bit more bouyant and perhaps a bit clunkier, but again I attribute that to my size. The GT comes in small, medium, and large so mix and match. Although they are kind of hard to find these days.
Also I'm looking at a Liquid Logic Trigger right now. I've never paddled one but it seems similar to the GT and X. The description of the boat said it was made for people under 150lb.
Good luck!