Welcome to BF! And... +1 on the hardtail MTB or maybe a hybrid for a good starter bike. Definitely do some window-shopping and advice-gathering at a good LBS. They should be able to come up with something that should fit your physical size, budget, anticipated riding style and other needs. I use a 2005 Diamondback Sorrento (a $225 embarrassment from Dick's Sporting Goods) for my winter/bad weather beater and I love it (quick, tight, precise shifting and it absorbs abuse and punishment like a sponge)... moral of that story is you don't need to spend long bucks to get something serviceable. Happy shopping and happy riding!