Ok two things. I've been reading several threads about the MRev 2 and a couple different plenum spacers. The thread from Wired 24/7 helped me out a lot but I want some direct opinions from some fellow Z owners. If it were your car would you go with the MRev 2 or the Spacer? And how tough is the install for both?

I read that together they require a tune for maximum performance. I plan on adding a few more mods and I don't really wanna tune it a hundred times so I'm just going to put one in for now.