I bought a used Avatar Neo 210 cabinet about a year and a half ago. This has been my rig for smaller rooms, and has served me very well. A couple of weeks ago I brought it to a gig, and discovered that both speakers were blown!

(Luckily the bass player I was subbing for had his Ampeg 115 upstairs at the club...)
I suspect that one of the speakers was blown when I got the cabinet, or it blew at some point when I was using it, and I just never noticed the whole time. At any rate, I'm considering whether it's worth it for me replace the speakers, or pick up an entirely new cabinet. I don't want to shell out much more cash than it would cost to replace them. I'm looking at roughly $100 per speaker plus taxes (I'm in Manitoba, so add 12% for that), so I wouldn't be averse to spending somewhere up to $350 or so for a cabinet. I've been looking everywhere for used, but there don't seem to be that many kicking around right now...
The Avatar Neo 210 was rated at 500W at 4 ohms, though I seriously doubt it was actually able to handle that much power. I was running it off my Hartke LH500, though I tried to make sure I didn't push it too hard (evidently, I didn't try hard enough!)
A couple of the cabinets I'm considering are:
Ampeg SVT210AV: this retails at $330, and is rated at 200W at 8 ohms, so I'm a little concerned whether it will give me enough "juice". The LH500 is supposed to put out 350W at 8 ohms. I do really like the Ampeg tone (I had an Ampeg 410 at one point which was really nice).
Marshall MBC115: this retails at $325, and is rated at 300W at 4 ohms. I'm looking at this one because my main cabinet is a Marshall MBC410 (600W at 4 ohms) which I absolutely love, though I wouldn't be able to run these together off the Hartke, as it doesn't go below 4 ohms. I also haven't used 15s in a while, though it was my main setup for the longest time until getting my current Marshall.
Hartke HX112: this retails at $375, and is rated at 300W and switchable between 4 and 8 ohms. It has the advantage of being designed to match my Hartke head. I've never used a 12" speaker, though, nor the Hydrive speakers, and I know they get mixed reviews...
If anyone has any thoughts/suggestions/opinions I'd love to hear them! In the meantime I'll keep on hauling my 410 to every gig... I love it, but it's seriously heavy! Well, at least it's not an 810!