My experience is virtually identical to crion. My setup is 3 5200's in front (horizontal center) and 4 5000's side/rear. When M- released the new sub, I went on a listening expedition of subs that lasted most of a year. My bias was musicality first and movies second, but wanted performance for both. Meridian's new sub was my first choice, with the Revel a close second.

I actually liked the Velodynes a little more than crion describes I think, but agree they were a distant 3rd for musicality voice matched to the M- ; (That said, many are happy with them and much has to do with individual taste);

I wanted to get 2 SW1600s to better balance the room for musical reproduction; but due to the odd M- price structure, ended up getting 2 SW5500s instead. That turned out to be way too much for my room size, so I sold one of them (to chris1971 above actually - who needs to sell due to his HT physical constraints);

I'm presently using 1 SW5500 in a room 16 x 21 with great results. More than enough; with all subs though, you get more balanced presentation and wider sweet spots if you can use 2 (actually 4 is best to cancel room nodes); If I had my way now, I would have 2 SW1600s. However, properly tuned, the 1 SW5500 is wonderful....

ken