I know its a very subjective thing, but I really dig the tone fo aluminum cones. I used to play a Hartke 4.5 and 115 XL which I was really happy with, but it got sold years back when I went to college. Now I'm looking into getting another stack and want to recreate the same sound, but Hartke seems to be quite hit and miss with their quality now (I use a borrwed 410XL in one of my bands, its nasty and a lot of the ones I've played in stores are worse). I remember a company called Bull Frog made some great aluminum cabs, no idea if they are still around. Apart from that the only other aluminum cone cabs I can think of are the Behringers, which are not real popular here but are at least on my list because they are priced so low. I know you get what you pay for, but I plan on putting most of my money into the head (either an SVT4 or possibly an 1001-II). Any other cabs I should look into? I'm after the cleanest tone possible with maximum sustain, even with my low B. Go slam the B1 key on a piano as hard as you can, that's pretty much what I want to sound like.