:and let you use my map and my extra VPC harness? :) :Seriously, I think you made a good choice. E11 is an excellent unit IMO. I don't think you will need much NOS to hit 800rwhp. :Don't need no handbrakes. The Haltech's multi-stage rev lim will give you upto 15psi of boost on launch. Just get a set 15" ET streets, dump the clutch at high rpm and pray nothing breaks. :)
That's the beauty of that clutch. You control how the power is sent to the tires by slipping it so it doesn't necesarrily have to shock the tires. Also better launch capability since the you start loading the suspension too. I totally love it both on the street and track. Just need better brakes to start the boost launching :-).