Just wanted to share my thought about Continental DWS Tires
I just installed a full set of Front and Rear on my E70 4.8 X, with Sport Package and 20's
Sizes: 275x40R20 front and 315x35r20 rear
Previous tires: Stock Dunlop RFT
I never thought that i would such a difference, major change in road noise and ride quality.
I felt that i was in a sedan thats how quiet and soft these are.
Even with Active suspension, over bumps it felt much softer
haven't tested on the performance level, but i'm sure it will be better then stock Dunlop RFT's.
Apparently front size is on back order on most sites including tire rack, but i managed to find it here and at a lower price too.
this is where i bought them:
Discount Tires - Discounttires.com has the lowest prices on tires and wheels, all name brands, and a huge inventory. In most cases, shipping is one to two days guaranteed.