I have searched craigslist extensively but I felt I was getting a little more value based on the discounts from the CD store. Also, I don't know anything about bikes at the moment (and will learn over time), so having the LBS warranty/help is valuable.
I don't have a preference but I have only tested Alum frames as carbon wasn't in by budget. But as I was leaving the CD store, the guy said we also have this Supersix 5 (105 components) for 1500 if you're interested in upping your budget.
Right now, I want a bike that could have a good resale value later (appreciated by amateur bikers like myself) and also something that's within my budget 1000-1500. And yes kinda brand conscious, so looking at Trek, Specialized, Cannondale and Giant. So far Cannondale is giving me most value/component.