I'll probablly give Sitopway a try too. Digging around their website, I see they do PCB Assembly too (which PCBCart doesn't). And with small minimum orders too!
Yeah, PCBCart is a no-go for first prototype run, but for bulk orders of a proven design, it's great.
Another good company (based in Canada), but PCB manufacturing/assembly done with their partner in China, is Myro.ca
Prices just a tad bit higher than PCBCart, but quality seems also better.... I love their gold plated pads option (but unfortunately, they don't do large areas of gold, like card edge fingers).