I'm in the market for a new amp, willing to spend up to about $2000, and I ran into the Peavey Penta last night. It seemed like a more versatile version of the XXX, but I noticed it had a passive eq as opposed to the active that I see written down a lot. What's the difference between passive and active eqs, and which should I go for? I play all sorts of metal, from Slayer to Behemoth to Pig Destroyer, but also some more mellow stuff like Rise Against, Sublime, and Clapton. Any and all advice is appreciated!