considering there is a new M5 model out there, I'd call it even. Considering the DRC issues, and the ability to continue maintenance on the BMW....I'd have to give it to the BMW there...though with a chip the RS6 is a great car...

Depreciation will kill all these cars...BMW and Audi alike, I've owned my share of the RS6, M3, M5 & RS4.....

that said, I've been offerred more than I paid for the ferrari...sort of how I tricked the wife into it in the first place...WHile it is more expensive than any of the above, so far in two years of ownerhsip is has cost me about the same as the RS6 did. almost 0 depreciatioin...considering the RS6, the depreciation, the Stasis suspension that shi% the bed, then converting back to DRC to trade the heap away....

2007 Black RS4
Stasis SL
275 RE-01Rs
Hotchkis Rear sway
Strat Short Shifter
Dual LPP Jammers upfront
GMG Catback
Ferodo pads