I've got a semi vertical mounted speakers 2×12 is that what you call an oversized? I'm sure I could put 4 10's in there
No.
The cabinet I am referring to is a Bogner cabinet. It is in between a regular 2x12 and a 4x12 in size. It has 2x12 speakers They make an oversized and a traditional. The oversized is the best 2x12 cabinet I have ever heard out of the 2x12 cabs I have come across. Still, nothing touches a proper 4x12 (IMO) for what I do.