I'm currently using 2 Avatar Vintage 2X12's with my Roadster and I'm very happy so far. Yea, the Recto 4X12 is a beast to lug around.
http://forum.grailtone.com/viewtopic.php?f=24&t=33612
The bottom cab is loaded with 2 Hellatone 60's in a closed back cabinet, the top cab is loaded with Mesa Black Shadow C-90's in a semi-open back cab. Very big and open sounding, not as thick in the bottom as a Recto 4X12, with more pronounced mids. Cleans are much 'cleaner' and clearer than the Recto 4X12, and the high gain channels are punchy with just a tad less bass, but plenty enough to really shake things without getting flubby. The open back C-90 cab alone is very clear and cutting clean or dirty. The closed back H-60 cab is well focused and has plenty of bottom
for a 2X12 when used alone.
My favorite combo is the C-90 open back on top of the Recto 4X12, but that is over-kill for anywhere I'm going to play! Our rehersal space is only 30 X 30, and dragging gear like that around just plain sucks.
The cab construction is OK, nothing special to write home about. They are solid cabs, multi-ply birch with nice tolex, standard plastic-like woven speaker grill. My Vintage cabs are rear-loaded with "T" nuts making speaker swaps easy. About 50-ish pounds each.
IMO, a good cabinet for the money.
Dom