The probeam is my next purchase. I got the charge pipes for Christmas from the whole family. It was awesome.I agree that the LNF is a good solid platform. What it doesn't like is to run lean, and a bad tune will kill it very quickly.
The single best thing you can do to the car is the ProBeam, and that should be everyone's first step.
I'm gathering parts one or two a month, until I've got what I'd like, then I'll assemble it all at once.
Adding baby number 5 is on the way, and piecing it together slowly is the recipe right now.