I picked up my Model S75D (white, pano roof, black next gen seats, AP) last Thursday. I love everything about the car, except the sound system. I'm annoyed with myself because my original config included UHFS, but I removed it right before finalizing the order to save a few bucks. I'm not an audiophile - far from it. But I like my sound systems to be loud. I don't blast music all the time, but every now and then a song comes on and I just want to blow my ear drums out. I was able to do this in my 2009 Acura TSX. Again, the sound quality was probably crappy, but it was loud enough. The Tesla sound system, on the other hand, falls just a little short. It's powerful enough - almost, but not quite. I can turn the sound up to 11 and still want a little more. I've found that if I do this *and* set the bass/mid/treble all the way up, it's almost enough. My rule of thumb for any sound system is that you should never have to turn it all the way up. Is there anything else I can do to improve the performance of the base system? My sources now are bluetooth streaming and Slacker - would lossless files on a USB stick sound any better/more substantial? I guess this is just a PSA to anyone who is on the fence about the premium sound - just get it. $2,500 is a rounding error for a car this expensive.