Hey Jon,
I can't comment on other Celestions, but I have a pair of little-used Vintage 30's up for sale right now that sound fab:
http://www.jemsite.com/forums/f28/2-celestion-vintage-30-speakers-16ohm-12-1-month-use-89870.html
Great sounding, very punchy and very articulate sounding speakers. I've only changed them out as I had an itch to get some JSX speakers for my cab to match my head (JSX, obviously!).
Obviously the cab you use will make a difference to the sound also, but I guess there's no way of telling exactly how they will sound with your head/ cab until you try them out. I play predominantly rock/instrumental/indie style music in a covers band and the celestions were great sounding in that situation. I have some not-so-brilliant quality (but give you the general idea) YouTube clips of the band, with my sound coming from a JSX driving the Celestions, but I don't know how relevant that is to your setup / style etc. If it would be of use, let me know and I'll post a link
If you're interested, I'm up for doing a deal. If you're anywhere near me, you're welcome to put them in your cab and try them out for yourself.
Let me know!
Cheers,
Sukh