I'm definitely a fan of the bulls bike!

But thanks everyone for your responses, I figured the Giant might be too big because I don't really want to have to put the seat all the way down to the frame, and even then, might not work. I'll probably go and check the diamondback out for sizes, but I guess I'll have to try and make the decision on whether I want front suspension or not. Either way, for a good price I'll probably go with the Diamondback for now if it fits while I look for a more suited option for singletracks.