Speakers to alleviate room anomolies

You replace the VR7's with something else and you still are going to have the problem w/o the DD18. I don't see how changing the main speakers will do anything other than change the amount/frequency of energy the DD18 has to add to overcome the bass deficiency. What are you trying to accomplish; it is unclear to me?

Something is not right in what you're stating. The 58 to 70Hz suckout is fairly narrow and not that deep. I don't see how it would take the life out of the bass. Your room dimension are not good. Rather than swap equipment I would recommend you hire an acoustic engineer to measure your room and see what he recommends.

You want to make your room "sing again". So does that mean it sounded good at one time, or maybe that it sounded good until you measured the system? Now that you have measured a minor flaw it sounds bad to you. What did you change that made you unsatisfied? If the sub has corrected the problem, what is left to solve?

Speaker placement and room treatment are your best bet. Then when you're all done with that, the room will still not be perfect, only better than it was.

Vandersteen Quattro or 5's have built in bass adjustments which might be a better match. Audio Kinesis makes a system with multiple subs to even out bass response. These are just a couple of examples that come to mind if you are determined to change speakers.

Agreed with Rhljazz... Vandersteens have the ability to closely match the room. It works very well when you have a Vandersteen dealer set them up. They use a mike and a special CD to adjust the various pots built into the speakers's amps.

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