John, that is a pretty damn nice setup!
Back to the OP, I was || this close to pulling the trigger on JHM rotors, but decided at the last minute to stick with OEM.
Here's why: If you shop around a bit, you can get a relatively decent price on OEM rotors vs. the JHM setup. I ended up going through
www.genuineaudiparts.com and it cost me less than $1100 including shipping for OEM rotors. JHM runs you around $1450 the first time and then just shy of $1000 the following replacement cycles. At current prices I would have to go through 4 sets of rotors to justify the higher upfront cost of JHM. At the current rate, this means I'd have to own the RS6 for another 200K miles - I currently drive it less than 6000 miles a year and will hence never reach the break even point of the JHM setup. I also did a fair amount of research on JHM and I most definitely don't want to start a flame war, but there are a few websites out there that don't speak very highly of the company. Take a look at
http://jhmotorsports-sucks.com/ and make up your own mind. Granted, most of the complaints on that website deal with clutch failures and have nothing to do with brake systems, but the way JHM has dealt with the failures speaks volumes in my book.
I replaced rotors and pads this weekend. It is a very easy DIY job that anyone can do that knows the difference between a flathead and a phillips screwdriver and has a floor jack other than the Audi trunk widow maker. It took me a bit over 2 hours to do the left side because I was taking lots of pictures as I was going along and had several coffee breaks. The right side was done in 1.5 hrs and I wasn't trying to go fast. Realistically, you could do rotors and pads in less than 3 hours if you don't lollygag along the way.
Oh, I purchased EBS Yellows to go along with the OEM rotors - report so far after about 60 miles is a definite thumbs up! The Yellows have a nice bite. Time will tell how much dust they make and how abrasive they are to the rotors.