Hey all. I need my trusted friends here on TB to help me out. I'm currently running a Hartke LH1000 and an old Transient Attack HA3500 through an Ampeg 410HLF and sometimes for smaller jobs, an SVT 1x15. The problem is, after asking around and research, the pairing of these creates an unwanted hiss, due to the "hot highs" coming through the horn on my HLF. So, I'm thinking about switching heads. I need feedback on my list! Thoughts, negatives, positives, good pairings, bad pairings, personal experiences, other suggestions, whatever! Go nuts. I don't know if it's the 12ax7's that push some hiss through or not, but if you've got some suggestions for that existing problem, scream them out. Now, the list (in no particular preference order) MarkBass SD1200 Gallien Krueger MB800 Gallien Krueger 1001RB - II Ampeg SVT7 Pro Genz Benz GBE 750 I'm in a wedding band, but sometimes with certain rooms and situations, I can't have PA support. A big seller with me is HEADROOM! I need an amp that can really deliver. My Hartkes aren't bad at all, just a little too noisy, and IMO not rated quite accurately. I need power, but silence! No hiss, no messing around. Help me decide! I'm always buying and selling equipment, because I'm never satisfied. Please help me decide on a true work horse professional amp that'll match my cabs, give me beautiful tones, and that I can hang onto!