Ok, I will speak on this one - BSI. We talked to 2 different machine shops and when I gave the all the spec's that I wanted cut, added in the parts and my labor time to put things back together the price always ended up right where Stu's was. This is from shops that COULD DO what I wanted and they all had very little experience with VW stuff. Remember anyone can put a block in a Sunnen bore and hone machine (with no torque plate) and cut crooked cylinders (Just one example). Make sure you compare apples to apples.. In addition, when I go to redo the block next year I get the rebuild kit from Stu (competitive price for the parts again) and he knows everthing about my motor.
Now, you look at my ARRC times and go, "what the hell, he is clueless" I had a problem all season and it was not the mechanicals (or me I hope). I did find some problems in the winter (electrical) and hope that clears it up. My friend and team mate qualified 6th at the ARRC, had a stupid problem in the race - but our cars are identical. Our cars were on the Dyno a week before ARRC and I say my car was down on HP but Chris's curve was pretty.
In addition, if you don't want the hole thing start with the head, that's what we did. It put us in the top 10 sometimes and top 15 usually (at Mid-Ohio around 30 cars) and we worked on driving and handling. Again I ran a bunch of suspension calculations and had numbers and ideas of where to start, started calling shops and Stu knew everything I was talking about and could back it up.
Yes, I have the BSI banner on my car but I fund my driving (ask my wife). The one thing you get is experience as well as parts.