I talked to Fran at RCR today. Roller pricing on the monococque version will be under $45k and that includes pretty much everything except engine and transmission (and whatever electronics your engine requires). That means wiring is there, oil cooler and necessary hoses, etc, all setup for a Porsche engine and gearbox. They highly recommend using a 930 gearbox since you can flip the ring gear without modification for mid-engine drive and then you can put pretty much any 911 motor you want on there (and that tranny can handle up to 700HP fine).
I'm thinking of doing a well built 3.8L that's still streetable with Motec management and an AiM dash/datalogger. He said the windshield is one of the most annoyingly expensive parts at about $1000 each. I'd probably get a spare, which should insure I never need one.

Wheels look to be under $3k per set for extras, which is pretty amazing. The monococque version still retains the exact same suspension as the original did. It weighs about 130 pounds more, but a 3.8L with 930 gearbox is about 130 pounds lighter than the original engine/gearbox combo. So the balance will be a bit different to the good, and the weight difference will be negligible. The car will be stiffer than the original by a decent amount, at least in the center (obviously where it's most important).
I'm not putting an order in just yet...I think I'm going to be in the Detroit area in a few weeks anyway, so I'm going to visit when I go up and likely do one then. They're not ready to go into production on these for several more weeks anyway.
--Donnie