I used to have a pair of horizontal recto 2x12's. They sounded great, but the Celestion Vintage 30's were EXTREMELY directional. The vertical 2x12 will probably spread the sound out a bit more with the angled top, but it's bigger, more expensive, and heavier. The horizontal 2x12's were almost too heavy already.
If you like the V30 tone, I'd highly recommend getting some beam blockers or doing the tape on the grill trick to disperse the highs. With my old 2x12's flat on the ground, it was sometimes hard to hear myself in a band situation since all the highs were beaming right at the back of my knees.
I'd give the thiele cabs a try too. They sound huge and are quite a bit smaller and lighter than the recto 2x12's.