We went with the Delta Orleans line. We picked them out at the plumbing supply place with the contractor, but then I went online and found them cheaper. (Used Faucet Depot.) We got them in brushed nickel, but the chrome versions would be even cheaper. (Note that you do have to buy the handles separately.) In the guest bath they went with fixtures from Home Depot or Lowes. I do feel the difference between the two as the delta set is metal and then guest bath set is probably not. The guest set is by Moen - either the Banberry or Brantford. For all of them, we wanted one with a higher arc. They went with cultured marble tops with the integrated sinks. They did them at the current house over 15 years ago and aside from an accident with a candle, they look about the same as when they were installed. This was in the bathroom that my sister and I shared. We each had our own vanity and each morning we would sit on the vanity, with our feet in the sink, to apply our makeup. So, they survived lots of makeup spills, curling irons, etc. with no problems. We didn't have pure white, but it is white with grey streaks. This was dirty and the plastic was still on the counter and a cell phone shot that does horrible things to the way the cabinets look, but this is there guest bath vanity. I don't have a good picture of the master vanity, but here is a similar horrible shot showing one sink. Like the above poster, they haven't been in the new house long enough to say how they will withstand the test of time, but so far they feel very solid and we are very pleased. In chrome, the Delta Orleans is around $100 from Faucet Depot. This is the smaller centerset one. The wide set ones are going to be more, no matter which brand you go with.

Any custom cabinet maker on the planet can make that. Start local.

Put some cash in your pocket and head over to a local stone fabricator. They've got a few mistakes leaning against the wall, believe me. If you aren't too fussy about color/particulate/movement, you can save a ton of money converting their screw-ups into cash.

Pull the top and reinstall the cabinet plumb and level please. You use shims to bring the floor/walls to the cabinet and latex caulk there if need be. When you reset the top, it will be level and the gap will be gone.