I am about to purchase a new bike to commute ~ 7 miles (each way) to and from my work, almost all of which is on paved bike paths. I will also need to bike to miscellaneous places within my area sometimes, so I don't have to wait forever for the bus

I went into a bike shop last night and got a few recommendations. I was first showed the Trek 7.2/7.3 FX/7.5 FX models, touted as being good for a commute. After I asked if there were any other options, I was showed the (more expensive) Specialized TriCross, which has the curved handlebars and a reportedly lighter frame. The curved handlebars were said to offer more comfort--this alone sells me on the idea of paying a little more for comfort. I plan on using this bike for many years.

I would really appreciate your thoughts on these or possibly better models. I don't think I can afford to spend over $1,000, but that price point isn't a hard cut-off for me.

I am also curious to find some good/cheap places to purchase from. I live in Arlington, VA and commute to Alexandria, but I have no problem with buying online if there is a reputable and cheap online retailer that you guys can recommend!