Hi - Background - I have a Aguilar 500SC head that I'm very happy with, though there are occasions where I'd certainly love to have a nice, compact, super light weight head. Anyway, I like the "500 watts range", as it covers all my needs - I have 2 1x12 cans (8 ohms each) and also a 1x15 8 ohm cab, so i can mix/match various ways, depending on the gig. Like most of you, I'm looking for clean power, compact size, light weight ...and I prefer a vintage, full tone. I typically set the Aggie "flat" or bring just a bit of the low mids out. All that said, I can get a Promethean 500 head cheap, but won't be able to try it first.... so...maybe some of you have tried both the Aggie and the Promethean and can compare and contrast, and help me find any limitations that I might expect. Even if I get the Promethean, I'll still be keeping the Aguilar...but sometimes it would be nice to have a head that can fit in a gig bag ! Thanks in advance.