I really want to downsize as well. As much as I am jonesing for a Boogie 400, I sure don't want to carry it on a weekly basis. I've been lugging a rack of power/pre amp of late and it gets old.
I have my eye on the TC Electronics heads, either the RH450 or the Staccato 51. I'd love to carry a sub 50 lb cab in one hand, a bass in a bag on my shoulder, and maybe a small duffel or backpack with a small amp, cables and accessories. One trip. Anyone try these yet?
The small Carvins may be light, but the wattage is low and there can't be a whole lot of speaker area in such small boxes. I also like the idea of the head separate from the cab. I think you can carry more of a system as separates and remain super-portable.
Of course, if 250w is enough for your purposes, then it matters little.
-bob