Want to ditch my car and just use my bike as my only source of transportation. I live in Gainesville Fl, which is a pretty bike friendly city and not too hilly. I've been riding a mountain bike for years but now I want to switch to something that's fast and good for all around transportation/commuting to work (probably around 7 miles each way for me). I'd also like to get a bike trailer for toting around my kids on the weekends.
I'm looking to spend $500-$700, nothing too crazy.
Here's my question... what kind of bike/style/brand would y'all recommend?