Skuras:
I have been very happy with the PrimaLuna. Since this is my first "real" pre amp I am not sure I am the best person to give you a review of the quality or sound characteristics, but I don't have any complaints about it so fare.
Sol322:
I haven't made any real changes to the system. I have played around with different cables but nothing has impressed me enough to move away from the midnight cables. As for acoustics I haven't really done much of any thing. The space I live in is around 1000 sq ft and is one big room. Two of the walls are brick and two are drywall. The ceiling is 16 ft high and made of 2 X 8 's. The setup as a whole is a little on the bass heavy side, but I attribute a lot of that to the Paradigms. Given the openes of the space I am not really sure what options I have for acoustic treatment or if it would even help. I would really like to get my friends Meadowlarks over to see what kind of difference a real set of speakers makes.