I'm in the market for a Gallien Krueger bass head and I'm kinda torn between a few of them. I bought a Fusion 550 from Musicians Friend two weeks ago and I loved the sound of it , but it had a crackling issue so I returned it. It may have just been a tube , but I didn't have any tubes to swap them out to see if the problem went away. That said - The GK heads that I am curious about are : #1 - Fusion 550 (may give another one a try if other people think theirs have been reliable) #2 - MB Fusion 800 (When it's released) #3 - MB Fusion 500 #4 - MB 800 #5 - MB 500 #6 - 1001 RB #7 - 800 RB #8 - 700 RB I'm sure this question has been asked before. GK users - What is your favorite GK head (Model and mark)?? Thanks for your input!