I'm a little shorter than you (5' 4"). I have a Dagger Juice that I love - got it as my second boat after discovering that a GT does not really turn, or play, very well. I've taken it down many class IV runs as well as the occasional class V and it works pretty well (the lack of performance on class V is probably more my lack of skills rather than the boat). Unfortunately, I've found the Rx (Dagger's successor to the Juice) is a little wide for most girls (dunno if you are male or female, though, but unless you have wide shoulders it's not a great boat).
I've also tried a Jackson 2Fun, and love it for playing but found it a little tippy for any serious river running. I've used it on class III and IV, but didn't really like it - no secondary stability, really. Just my 2cents.