No vote here too actually.
Two champs in stereo or a bassman + 2x12 is a great pair of choices I think for small to large gigs. I can imagine in 6 or 8 months you would either get rid of the DRRI or bassman because of overlap (and I bet it'd be the bassman that stays). It is a great deal for someone that needs a DRRI, but this kind of thing has tricked me before too. Do you really need a flight case or does it just sound awesome? Maybe it's not actually adding value. Do you just want the speaker, or does it just sound awesome? Could you flip it if you traded speakers with one in the vibro king cab? Are there better deals on speakers out there if that's really what you want? If you're not unhappy with the speakers in your 2x12, I bet the alnico blue is also not adding as much real value to you as it might seem.
But anyway, just playing rational devil's advocate. It is definitely going to be a lot of fun to turn up.
ps Ooh, don't forget that a third option you have now is putting a mic on one or both champs.