what ever entry bike you get, I'd recommend something with 10spd. You may think the low end 8spd is enough but darn parts are hard to get and cost more then modern level 9/10 spd parts. To convert from 8spd to 10 will cost another $250.
this is a pretty good deal but only in lrg and xl, I'd say if your about 6ft you should be fine on the large.
http://www.trekbicyclesuperstore.com...n-123191-1.htm