After playing 10s for the last few years, I've found that I'm more satisfied with the deep/thumpy sound I get from my TNT115 then any of the combinations of 10s I've used in the past. I'm looking to get an entirely new rig consisting of a couple 15 cabs and a new head. I've decided on taking the Ampeg plunge for the head (likely an SVT-3PRO) as I'd like to add that signiture Ampeg mid to what I love about the sound of 15s... I'm planning on grabbing one SVT-15E when I purchase the 3PRO and seeing how it sits in the mix before deciding on weather to buy another 15 to go with it. I've not played the 15E yet, so it's still up in the air. Just wondering if there is anyone out there using 15Es exclusively, or in a stack and what your thoughs on the cab are? i've noticed that from the specs it doesn't seem to have that high of RMS power handling...also the efficiency doesn't seem to be particularly good. Has volume ever been an issue w/ this cab? Thanks for any input!