Hard to beat the Eminence 3015HO. That LDS 31015HO cab is great if you like it warm and grindy and punchy.
B&C makes some great drivers also, and I've heard some very nice cabs LDS cabs with the very expensive B&C coax neo's in them... bright and modern sounding.
Don and I talked about the Beyma 15's, and they are nice, but seem to require a much bigger box than I'm interested in (at least the super duper ones that might be an improvement over the 3015HO's).
Here's a clip of an LDS 3015HO one way cab that I did a while back. Killer warmth, grind and punch to my ear.
http://www.icompositions.com/music/song.php?sid=121137