PCBWAY is a good choice for both Fab and Assembly. Just went through my first FAB+Assembly order and here is my experience:
Quote from SEED-
The quote never arrived.. I have nothing good to say about my experience with SEED. I design the system specifically around SEED parts using their design guidelines and part catalog on OPL. I was able to complete the design with only 2 parts not being a SEED part. When I tried to get a quote online they said I needed an offline quote to proceed for the 2 parts. I emailed the address provided and then they told me they are not doing online quotes for the US at this time. I then called and they said they would. I then emailed and reminded them. I got a response saying that I need to do it online. I replied explaining I could not. Got another response saying giberish. That went on for about 15 emails until I gave up and paid to redesign the board using standard parts which essentially double my initial cost because I pay by the hour for a designer I use....
Quote from Advanced Circuits-
The quote less than 2 days to receive and was a little on the pricey-end although their return times are pretty quick. Too expensive for me but I would recommend them for just PCB fabrication because I have used them before and they are very good but again not the cheapest. $35 a board or so.
Quote from Screaming Circuits-
The quote 1 day to receive and their turn around times are crazy fast. I looked into them because they are very fast, like 1 week fast. They were the most expensive though. $1350 for 5 boards was the subtotal before processing and shipping.
Quote from PCBWAY-
The quote arrived less than 24 hours. They seemed to want my business and worked with my time constraint. Extremely good prices only $58 for fab on 5 boards on 24hour express option! PCB fab was done in a night! Assembly fee was only $129 plus parts for 5 boards which I think is a great deal. After shipping I paid about $300 total to receive 5 boards fully assembled. The boards where also pretty large(4" diameter circles) with several components both through hole and SMD. They shipped my order 8 days after I placed it. Shipping takes about a week. Nearly a 2/3 week turn around for a company not in the states is pretty incredible.
I am using again for another project soon.
They also do large qty orders and their Part prices are pretty good. Would recommend them.
PCB Way
http://www.pcbway.com/