Right now, the rig I'm saving up for will most likely include: Aguilar DB680 QSC PLX3002 Aguilar GS212 (with the possible addition of another GS212 or GS410 later on) But I noticed today that someone was selling a DB728 for a pretty good price and I started wondering if I should go for it. My main concerns about it are: 1) Power - The band I'm with currently plays mostly metal, and can get pretty loud. Will the 400w DB728 be enough? And will it work well with the GS212's? 2) Weight - For those of you who own DB728s...are they a burden to carry around? 3) Maintenance - Do tube power amps need to be maintained differently than solid state power amps? Is it more expensive? Should I go for the DB728? Or should I stick with the QSC? Also... I know nothing about tube power amps, so I'd greatly appreciate any assistance you can provide.