I have the sunbeam cafe series (not planetary) and had to have parts replaced under warranty. The lovely fix it man put in metal replacement parts instead of the plastic and since then (5 years) it hasn't missed a beat despite heavy use.

I commented to the lovely fix it man that I should have paid the extra and got a KA, and he said the most repairs he gets are KA by a long way. His recommendation was a kenwood every time. He says people should get granma's reconditioned rather than buying new anything

Maybe just get the extended warranty whichever way you go

ETA: oh, but yes. You do want an expensive mixer. Can't beat a stand mixer for convenience