I am planning a 5.1 system that will be used 50/50 music/HT but if I had to compromise I would prefer the music to sound better. Due to budget I think I will be using all vifa drivers. I have decided on 3 way mains with dual woofers and have been recommended the D27 tweeter, the P13M mid, and dual P21W's. Do you think the dual 21's are just too much speaker? I was thinking more along the lines of dual 17's. Note that I will also be using a tempest. For the rears the distributor of the speakers has recommended 2 ways with dual P21W's and a D27. This is far from my intended single P17 and D27. The box for the dual 21's would have to be at least 60 liters! Again is this too much? What do you guys think? The room is 5m x 7m with high ceilings and carpet. Also just on the drivers, do you think you can get really good sound from vifa's? I have used them before but never really tried to optimize them. And last thing do you think the P13M mids will be loud enough for music in my large room? Thanks for any help. Pat.