I like the older CTS 10s and 12s in my guitar rigs...warm, full bodied...but not for bass..they seem carboardy and tend to whimp out before I can get my rig to the level of volume, tone, bottom that I want for bass...in fairness, when I used to play bass regular bar gigs...my rig was a 200 head through a pair of the 2x15 cabs..and I'd run a Boss bass eq pedal in front of the kustom to get me as much as 15db boost in freqs...
of the 3 you've mentioned, I'd tend to go Emminence as well..and if I recall some older conversations with Bud when he was first putting the Krossroads stuff together..he had wanted a different speaker but especially in the kombo cabs, he couldn't get enough air into the box with the 10s..and I think that's when he went Emminence..and I can't recall if it was Beta series?...you're not really pushing enough watts to leverage the bigger drivers anyway, and I recall buying some Gamma series 15s for my Kustom bass cab one time...and was surprised to see that the frame edge on those driver baskets is so thick that the mounting bolts on the faceboard of the kustom cab weren't long enough to got through the basket frame and have thread left for the but to bite.