Originally posted by LittleBigMan
Devster,
Don't be in too big a hurry--shop around. You may also be able to get a good deal on last year's stock (but beware--sometimes they have minor flaws or are the wrong size) Especially with summer drawing to a close and the "cycling season" supposedly coming to an end, dealers may want to clear some bikes out. 
Your getting some really good advice here and I agree with LittleBigMan shop around take your time and read as much as you can about commuting . I don't peronally recomend aerobars for in ccity commuting, rarely used and most of the time inconvienent, but everybody has their own riding preferences, they are grand on the open road though.