As much as I love Symphony X, there's one thing that stops me from fully enjoy them and that is the god damn guitar tone that Romeo has. It sounds shit on albums and it sounds even worse live. He's a living example of how to use digital products like Line6 the WRONG way! Listen to Opeth to learn how to use it correctly! Or even better, use equipment like JP does. He always has a good, heavy tone that cuts through the mix and you can actually hear every note he plays.
/rant
I agree somewhat. On albums I think his tone sounds good (he uses a lot of different amps when recording - Mesa, ENGL, etc.), but live I think he still uses the Line6 Vetta II (at least that's what he was using when I saw them in '05), and yeah, it sounded pretty weak. Even if you watch their performance on the Gigantour DVD, his tone doesn't cut through very well.
But, just out of curiosity, since when has Opeth used digital amps? Last time I saw em they were using Laney heads.