With my Ampeg I'm using my old SVT 4x10 and 1x15 cabinets, actually the 4x10 is almost always enough!
Nice... I'd love to try a 4x10 - from what I've read they have a fair amount of punch and with the right speakers/cab design can get plenty of bottom end. There's a new/old stock Hartke 4x10 cab for sale here locally for $450 - it's tempting and would love to try it but I really need to rein in my spending for a while - unfortunately bills and stuff have to take priority :/