We are in the process of a quick (& relatively inexpensive) bathroom update. My granite guy has offered to fabricate me a granite sink for my vanity (which I'm quite excited about) for a couple of hundred dollars (not too bad for a 30 inch sink). I realize I need to purchase a white, undermount sink for it as well. I have a call into him, however I wanted to check in with the resident experts...

Does anybody have experience with bathroom sinks(I was a pro with the kitchen sink) -- does it matter if it is front or rear overflow? Are they standard sizes? Depths? Qualities? And suggestions for where to purchase them would be great. I have a vanity that should arrive in the next 3 weeks & want to have this ready (in hand) before he comes to fabricate.

Thanks in advance!