i've owned many revisions of both and i'd go boosted recto for sure, and the new recto is the best imo. I have a good friend who swears by his 6505+, but everytime I bring a recto over he spends the whole time trying to dial his damn amp when he hears the recto. Funny thing is I still love my peaveys, and hope to find another sig model. Both are really kick ass for metal. Both sound best with a v30 cab imo. Peavey is half the price, also I felt my 5150 sig sounded best compared to the other revisions, just sounded more aggressive and pissed off, and the new recto sounds less muddy and also more bright compared to the other revisions. All opinions though. Check out Ola Englund, has good clips of both, dialed how he likes them, so you can get a good comparison.