I'm looking at getting a matched set of Ruby Tubes because a guy I talked to said it might get allow the Twin Reverb to attain a more modern kind of distortion out of my POD XT Live. Any opinions on this statement? Any previous experience with this kind of swap? Any more tube suggestions? Bear in mind, I don't mind throwing out a little cash to re-tube it, its my baby and I want it to sound its absolute best.