I think I'd use a solid surface with her cabinet finish, as they have a similar quality. Some have successfully used soapstone laminate, custom thickness same as soapstone.

I think a cream and soapstone would look fine. Coloring of it varies quite a bit though. Lots of threads here on it.

My cabinets are actually custom, not Martha, it is the color that I am concerned about. I usually see soapstone with a bright white, but in my space I think the creamier is warmer and more inviting.

I think there was a thread on this fairly recently with a photo example.

MS 'Heavy Cream' is a definite yellow (I think a pretty one); so I think it really will depend on the SS that you use. I have a sample here still that I think it looks okay with. My granite is a grey-green-black similar to lots of SS and I used MS 'Gull' which I think turned out really well. 'Gull' isn't really a very creamy color, though. it has some gray to it.

Soapstone definitely works with lots more than bright white.