I have the Classic Rock (Marshall) version and love it. I take it and a Tele on business trips to practice in hotel rooms. Through headphones, it really caputures the thump of a Marshall quad cab in a room. It reminds me a lot of the first Aersosmith album.
Take your guitar and your 'phones to GC and try them all, see which model you like.
"This is not acceptable behavior in a jazz club." - Mark Gane