Doing Phantom150 and uTKL is fine for me, since that still gives a ANSI125 option.
Although thinking about it, my primary want for stainless steel, is for a stripped down keyboard, where the plate doubles as a face, but with both uTKL and Phantom, that isn't an option as their are holes around the arrows. That said, it really doesn't matter too much which material it is, although I still give stainless steel the edge because if it is cheaper.