Upgrade-itis has set in. I currently have a 340c, 170s as mains, and some old klipsch kg4s as surrounds. I have an SVS 20-39 pci sub. These are setup in my 12x15 room, 102" screen projection set-up. I have an HK AVR230 receiver, but the ascends are powered by a Parasound amp with 85 wpc. I am selling some Maggies (mmg/w and /c) and will use the proceeds to do one of two things: 1)sell the maggies and my current sub, and upgrade to either a pc-ultra or pb12-plus/2 sub; or 2) sell the maggies, get a pair of 340ms and mount the 170's as surround speakers. Any thoughts on which setup will have the most impact in terms of actual listening enjoyment? I really like my current setup, but I must upgrade. The 170's are so good, I dont know if going to the 340's will have the same impact as a significantly more powerful sub.