This is the system I have built over the last couple of years. The Mac amp and pre are the real heart of it, giving a rich, musical sound. This is not a detail lovers system, but it is totally enjoyable to listen to for extend periods. The subs fill in the bottom end nicely, and are capable of really rocking when needed, but usually aren't even noticed, until you turn them off! This is an apartement system, so placement is less than ideal, the room is kitchen/living room about 20 x 15 x 8. Main speakers are 2 1/2 feet off the walls, one sub sits under each one. The Jags are great speakers, but not efficient. If I were going to replace them I would look for something more dynamic, and perhaps with a little more detail, but w/o sacrificing the listenability of the overall system. I listen to alot of older recordings, not just audiophile stuff, so I need and want a system that is musical first. Not much money at this point for upgrades, I think it is time to tweak, so I am going to do some DIY sandboxes etc. Thoughts? Comments?