I have been looking into the pro 800w head and the pro 400w combo with the addtional 15 cabinet. I jam'd on the 800w head through a 410 cabinet Saturday and it sounded great! I was thinking about an Ampeg SVT, but I have changed my mind for the Bassman Pro amps. I am going to check out G+K tomorrow though. I was playing a Lakland skyline Hollow body through the 800w head.......Looks like I will be buying a Lakland soon too!