Help me choose a 12" speaker for my 525+

I am working on a 2 amp setup for future gigs that are rapidly approaching.

1 of the amps will be my 525+ head with a 2 x 12" cab (closed back with a couple of ports out front)

The cab is on the way....I have a 1 x 12" Boogie cab with black shadow (MC90 I think) and will toss that into the new cab

I need another 12" that would go well with the Black shadow\525+

Any suggestions are welcome

side note: My other amp will be a Peavey classic 50 with 4 x10 cab

TIA

IMO the v30 is a great match, as is the creamback65/75. Perfect matches for the mc90.