That's a great start. I'm personally not a fan or the Borla exhaust for the G35. It's a little too loud and borderline "ricey" for my personal taste. But to each his own.
Are you buying the grounding wires from Nate (Sentientbydesign)? So far everyone who has purchased his kit seems to be quite happy.
Sentientbydesign wrote: If you're auto, then the MREV2 is going to yield very small gains. You'd be better with a spacer alone on the auto.
Nate, are you sure about that? Where did hear that?
Also MB86...another mod that I got that I was very happy with is a strut bar from GTSpec. It's an affordable mod and I noticed a better response in my G's handling even though I have my winter tires on.
I HIGHLY recommend calling Joe at everythingg35.com. He is incredibly helpful and offers great customer service!
Good luck!