There are some speaker samples that Andy has done here (they have been posted in other threads I know, but seemed kind of revelant here):
http://andysneap.com/media/speakers/
I think the amp was 5150.
On a side note, I am looking at getting another 4X12 that I can leave where we jam (saves me carting around the Mesa Traditional that doesn't fit in my car because of the LPG tank and I want to use it at home for recording). I am looking at the Marshall 1960A with G12T-75's or the 1960AV (with V30's), but since the Mesa already has V30's I am thinking of the G12T-75's for some variation. Head is Krank Revolution.
Opinions/experience would be appreciated.
Thanks