Jesus why is everyone talking in abbrevations?
Anyway here is my take on things.
I have fried several SS amps, but at present I still use SS. The simple reason being that most of the time I cannot afford to buy a valve amp. I have played through a few valve amps and have mixed opinions. I have gigged an SVT 2 rig on several occasions and been bitterly disappointed. I found them to be very thin sounding and completely lacking in any "grunt". I have also played a couple of Trace valve amps, which were alright. The one that totally blew me away was the Marshall VBA400. They are somewhere in the region of £749 new which is reasonable for an all valve head and the sound is nothing short of monstrous. It is fairly likely to give you a hernia when you move it, but I think the unberable abdominal pain you will suffer is well worth it when you see how many people are either making small sewage factories in their pants, or have simply gone deaf.
I am going to sit on the fence on this debate. Yes, a good valve amp sounds better, but they are more expensive, they can be very heavy and they do generally cost more to maintain. SS amps are cheaper, some of them do sound really good, but you can't get [i]that[/i] tone