My granite fabricator sells basic undermount porcelain vanity sinks; I even bought my 16-gauge stainless kitchen single-bowl from him. I think these are some trade brand, like Souci? I know they were $75 each - I was frightened by the cost of most rectangular sinks I was finding online! They are gently rounded inside at the corners, rather than having the sharp rectangular lines the more expensive sinks have. But, we were able to use these for every bathroom sink in the house:

Guppy, Are there other places to add storage space? Could you mount a narrow cabinet on the wall? How about instead of one big 36" vanity, you go modular? Would 24 inch vanity with an 12 inch wide drawer bank work with the plumbing? We are in the process of remodeling our small master bath (almost the exact size of yours). This is the *second* small master we've done, as we redid the master on our first house about 4 years ago. We found that buying modular was best for us. IN our last bathroom, We used a 24 inch vanity and then a 15 inch drawer bank for 39 inches of vanity space in all. We used a smaller mirror and a wall hutch in the area over the vanity. Then we added a bath storage cabinet over the toilet. We used Masterbath cabinets. This line is by RSI and sold at Home Depot. Lowe's sells the same line under the name Insignia, but at slightly higher prices. http://www.masterbath.com/upload/MB_Booklet_SO.pdf

You mean, remove the drawers? Hmmm, I’ll have to see if my husband is willing to do that. They are large, heavy drawers. I’ve had several surgeries, and cannot do it on my own. Btw, to accommodate the drawers, I chose a sink with a rear center drain, so the pipes are as close to the wall, as possible. Oh, and two things...we do not have a garbage disposal, so I don’t know what your cabinet maker was talking about. And, it was my contractor, not the cabinet maker, who cut the back panel of the drawer, and configured a notched encasement to accommodate the pipes.

I used a Rev-a-shelf for the flatware - originally planned on a 2 layer system but this works fine. For the knife drawer - love the insert - I hated the one that came with the drawer. 2 21 inch drawers flatware only Knives only - Wusthoff insert Junk drawer - several modifications since the picture