I'm told the Room Perfect in the Lyngdorf makes setting up 4 subs much easier, but I've heard that crap before... time will tell.

I'm sure it would. You can't fix a standing wave cancellation using room correction. The correction will tell the amp to make more power at the cancellation frequency- and the result is that you could put 1000 Watts into that cancellation and still have a bass problem. With a distributed bass array the standing wave is broken up- allowing the room correction to work properly.

Or it the Swarm only effective scattered around the room?

@mglik If your mains make bass, I'd place the Swarms to the side or rear of the room. They are only a foot square and if the driver is facing the wall (and the sub is only 2 inches or so from the wall) then they can be innocuous in the room. The trick is that they are asymmetrically placed so as to have differing distances from the center of the room- in this way they will be more effective breaking up the usual standing waves that occur.

Finally Learned: Subs serve much larger role than adding more low bass

My GF commented on how the addition of the subs really helped out the tonal balance in the high end- how the system became more relaxed.