Sig has been running stainless slides in alloy frames on their P-series pistols for 20+ years with no issues...Agreed. ANY Dan Wesson is a top notch product.
I currently own a 3 DW 1911's.
1 Valkyrie 9mm, 2 Valors ( VBOB & 5" VALOR).
People question the wisedom of using an Alloy frome and a SS slide. My Valkyrie has several thousand rounds downrange with no abnormal wear.