I'd love to help you out. Today, in fact, I'm getting the SVS PB2-Plus, which should have the same tuning ports, and I use the M60s as well. The biggest difference is in the size our rooms. But I'll let you know what I find out from experimenting.
Honestly the truth really lies in what you enjoy hearing (or feeling) the most. If structural damage is what's really going to give you that big smile and make you a happy man then I say here here!

"We're on the island of Misfit Toys"