I thought I'd go with stainless steel -- but we have iron in the water and the site on how to manage the sinks states that iron in the water will stain the sink a rust color eventually. Plus you have to clean in the same direction and avoid bleaches etc. etc. with the stainless steel.
I saw the Elkay sinks at a plumbing store and really like the look and the feel.
No staining and can use bleach and other cleaners with chlorides (important for paranoid medical professional)
I have heard that boiling water poured in it (without running the cold) can cause issues.
I know that Blanco makes this type of sink also. Anybody have one and what do you think about the granite composites in general?
Elkay e-granite sink or Blanco granite
These are good sinks. Better than stainless steel. Pretty pricey but well made and very sturdy. I shouldn't think that you would have a problem with rust but clean them with the iron removing stuff "Whink" and you should be ok. Test a spot first though. Get the one bowl deep sink. You will never regret it. So handy and better for those too big for the sink pans and soaking stuff.
I got the 'Ascend' Swanstone/granite composite in black.
It is essentially a one bowl but with a raised portion to put rinsed things.
It arrived in great shape -- got it from 'E Faucets" well wrapped quick delivery.
A fraction of the cost as compared to Ferguesons (chain plumbing supply) -- which was double plus.
Got the Grohe faucet there too again well wrapped --great shape. The faucet cost more than the sink!!!