Your suckout is pretty precisely cenetered on the fundamental of a kick drum - just kinda BAD LUCK - so it probably feels more pronounced than it might otherwise. The only thing IME that will address this type of issue (below 80ish hz) is EQ, like the room corrected Velodyne DDs or perhaps the adjustable Vandys.
If the idea is to keep the DDs (probably a very good idea), than you've got a ton of choices. I use Ohm 100s (omni) and sometimes Maggie MMGs (planar). But, honestly, any speaker with limited low end response will likely work well with the DD and provide the smaller cabinet you seek. Smaller VS might make sense if you like your VR7s, but want a smaller box.
Good Luck
Marty
If the idea is to keep the DDs (probably a very good idea), than you've got a ton of choices. I use Ohm 100s (omni) and sometimes Maggie MMGs (planar). But, honestly, any speaker with limited low end response will likely work well with the DD and provide the smaller cabinet you seek. Smaller VS might make sense if you like your VR7s, but want a smaller box.
Good Luck
Marty