Any idea how the RS6 is holding up with respect to its residual value? If it's doing well, I would expect that the RS4 may match it. This will lower my lease costs - I can't stomach the $80k purchase.

The RS6 holds its value very well, many used are selling upwards of 70 grand with 20K miles. Because it was a limited edition car only made in 2003, they have good resale value

how much is ur lease going to be a month witht he down payment?

With a sizable down payment ($15k or so) - I'm guessing about a $1k/month