Hello everyone ! While I love my trusty (and maxed out) MDD G4 Dual 1.42, I've had my eyes on upgrading to a Quad G5 for quite some time. Simple question: is the Quad G5 much, much faster than the MMD G4 2x1.42 ? I also have a Black Book 2008 (Intel Core 2 Duo @ 2.4 Ghz with 4GB of RAM). Will the Quad G5 top the Black Book 2008 (Penryn) or will it be in between ? Thanks !