Currently playing a Fusion 550, but have the option to trade for an SVT 4 Pro + $100. I have played through house backlined SVT 4 Pros in the past, but have never had time to really dial in my tone on them. I don't NEED the SVT 4 Pro, but I do own 2 Ampeg 610s and an 810e (I sit on craigslist way too much) so pairing an Ampeg head with the Ampeg cab is appealing... and the option to run 2 cabs if I feel like going overboard is relatively appealing... wondering what your opinions are on the two heads for those who have had more time with the SVT than I have. I know GK has more bite, but I've got a Sansamp for that. I play heavy rock and roll / punk. Tone is relatively similar to Joe Principe from Rise Against. Also the SVT 4 Pro is a 2007 model if it makes a difference. Thanks in advance!