+1 I'd go with the Avatar oversized 2X12 cab with Hellatones of your choice. The Carvin Legacy cab is also a good deal with the V30's and the option to run it closed back or open back, but I just don't like the smallish size. The smaller the cab, the less volume of air you have in the cab. This would make it seem to be punchier at mid-bass frequencies, but you'll get a roll off at lower bass frequencies compared to an oversized cab.
The oversized Avatar 2x12'' will have as much internal space as any other 2x12'' out there. Avatar cabinets are very solid, very good sounding cabinets - especially for the price and I think it's a better deal than the Marshall or Carvin.
If lowend punch is important, there's no way around it: you want a closed back cabinet. Don't even think twice about it.
I think you'd probably get a little thicker and more textured tone from the mids in the G12H30's. You'd add that to the tone of the Vintage 30's. Those two are my two favorite Celestions. The V30's are brighter and have less mids than the G12H30's. I prefer the G12H30's but love the Vintage 30's too. Lew