Vandersteen Subwoofer decision

I know you are going to think this is yet another repeat of the question of whether the 2wq is that much better than the 2w, but this one is different. I own a 2w and I am looking to add second Vandy sub so I will have one for each of my front speakers. Seems to me like I would have three options: 1) buy another 2w for about $500, 2) buy a 2wq for about $800 used, or 3) sell the 2w and buy 2-2wq's for about a $1200 total investment. Anybody have an opinion? My first inclination is to just buy another 2w, as I don't see where my "Q" needs a lot of adjustment.