Check out macrofab.net. They're based in Austin, TX, and I've had fantastic luck with them. Their quick-turn (5 day) service adds about $1,000 to the price, but that's not bad at all. You just upload your Eagle or Gerbers, an XYRS for pick & place, and a BOM. They'll order the parts for you, fab the boards, and do the PCBA. You can play with the numbers right in the web interface to see how much it'll cost for different quantities.
Honestly, for my business, they've changed everything. I used to order prototype boards from China with all of the expedited options, and then do hand assembly in-house. Now I just send them off to Macrofab.
I don't mean for this to sound like an ad, but I've used their service more than once and am super super happy with them.