Hi, I hope I can offer an alternative viewpoint with regards to getting that punch you require. Of course I'm going to suggest the Big Twin, it's an amazing cabinet, but it doesn't have a baked in EQ hump that you may be looking for.
So, wiith the right treatment I can get most cabinets to 'punch'.
Ask any experienced engineer in sound where the perceived punch in live sound comes from and hopefully they'll all come up with the same answer and will use often a graphic EQ as an analogy as to where to find it. Therefore, in order to get a specific character to my sound, i will include a decent EQ. (I have a few!) For 'punch' as an example I'd probably start by boosting around 100hz with a Q of about 1 octave, maybe a bit wider. Depending on the bass cabinet, I may also roll off the deepest lows too which creates more perceived 'kick' and less energy gets wasted in cabinets that can't reproduce sub 30hz.
I appreciate you are in the market fr a cabinet anyway, but for those who may have a similar quandary, this could be something to try before emptying the wallet on a new rig.