the gt sucks (imho)
what kind of boating do you want to do?
do you want to spend time playing or just running rivers?
there's tons of boats out there, the gt will keep you from learning how to play much (or at all). If I was starting again I'd find a playboat that fits you well (I'm 5'7" 170 so what works for me would not be a great boat for you). I'd go to confluence (or insert preferred kayak shop here) & hop in as many boats as you can & see what fits you & feels good.
ez series, ezg, cross river, there's a stack of great river-running playboats out there that would be great to learn in.