Go for a 21" tt.
i would def get a bike with back brakes, and that's all that is really necessary. But you can always install front brakes.
If you want more stopping power, just get sticky pads.
I think eastern and fit are along the same level. They dont make bad bikes, but you pay WAY too much for what you get in most of the cases, especially with the lower end completes. And eastern has a bad rep from a lot of their early run products. I would buy an eastern before i would buy a fit.
I recommend:
http://www.danscomp.com/101788.php?cat=BIKES (Very good bike and company and very strong bike)