the storefront seems to have bikes that they've already cleaned up and made all the adjustments on, which means that you're not going to get the best deal. I highly recommend the warehouse once it's open. But that's just my style. If you want a bike that you can ride home on, go to the storefront.
I've learned to make it perfectly clear when buying a bike from their warehouse that you dont want them to do ANYTHING on it, otherwise, tell them you want one tiny thing done like having the wheels trued for a flat fee, they will go to town (no stopping those geeks once they've started adjusting your brakes, shifter, chain tension, etc - seriously) and then try to charge you for it. But I'm not bitter. Oh wait, that's a lie.