I played my first live gig last weekend, and I didn't have enough juice to cut through the mix quite enough. Please check my sig for details on rig. Anyways, I wanna upgrade heads to either an SVT-CL, SVT-6PRO, or SVT-4PRO. I need all the info I can get on the pros and cons of each. All I keep hearing is "if you can afford tube, go tube." I really don't wanna spend $400 a year replacing tubes (what I've been told) if I can help it. The 4PRO sounded great in Guitar Center yesterday, and so did the 6PRO. I can get a brand new 6PRO for $850, a brand new 4PRO for $1000, or a used (in mint/like new condition) SVT-CL from a local guy for $1100. I'm pretty sure that I can talk the local guy down to $1000 though, he's desperate.
So, just how reliable are all tube heads? Am I really gonna have to spend $400 a year on tubes? Which head would you go with and why. Please be specific, thanks a lot everyone...