I have tested the Pod XT from Line 6 with Metal Shop included and I was really disappointed.
Over 50 amp models and every model does not sound like a real amp. The worst sound is coming from the tone of single lead strings. It sounds a little more better than solid state amps of the eighties. I checked the head phones, a real power amp with cabinet (shurly I had corrected the output type in the pod) and all sucks a lot. I can not develop any feelings while playing.
After this I connected my X88ur again and the world was fine.
I would like to compare tube amps and this virtual thing with sex. Here it is the same: Real sex is better than virtual sex.