If you're not set on Trek or Spexialized, take a look at the Diamondback Podium and Century bikes. They're both fantastic. Additionally, I wouldnt be doing my brand any justice if I didn't mention KTM (ktmbikes.com). The Revelator 3500 is possibly the most comfortable bike I've ever ridden. And I'm not just saying that because I'm an Ambassador. It's why I became one in the first place.

Personally, and this is just a personal preference, but I shy away from Giant, Trek and Specialized. Not because they're bad bikes, but because there are just too many of them out there. When I go on for Fondos or big group or charity rides, I want to look in the crowd of bikes and not have mine just blend in. So I tend to favor botique manufacturers.