A lot of modern amps and preamps sound great when you're jamming by yourself, but don't hold up in a band situation. The sound isn't dense enough, and the lows and highs tend to get soaked up by the bass and cymbals.
James HetfieldTrios aren't really geared for slide unless you're gonna play chords, or play that simple George Thorogood style. It gets pretty thin when you play single note lines.
James Hetfield