Yeah, I definitely want Vintage 30s since they are the standard speaker for metal, and I want this cab as a reference point for recording, so I'm really wanting a cab with the most 'cookie cutter' sound to it.
Another idea that popped into my head would be getting one of those Randall 2x12/1x15s and loading it with Vintage 30s and some 15 inch speaker, since I'm going to be (hopefully) purchasing a Vader 2x15 to pair with the 4x12, and with a Randall loaded with those speakers in the recording room I could get some 15 inch recordings when needed too.