I went with Bridgestone Dueler Sport H/P (street summer tire) for my 20's in non-RFT; great tire. I've run the Bridgestone Dueler H/L Alenza on my 2001 X5 with 18" and on my 2004 X5 with 18" tires. I got LOTS of miles out of those tires and they were quiet. Handling was superb.

I went around and around when I got my 20's for the 2011 (considered Toyo, Michelin Latitude and Conti Extreme DWS) and ended up back at Bridgestone because of my experience before and also my experience in general with the Bridgestones we've run on our 2000 323i and then later on our 2006 325i (it's RFT's lasted 10 months before the fronts were shot).

The sidewall on the Dueler Sport H/P's stiff and I've felt the cornering is more precise and there is minimal body roll. I was able to use the Costco price as a bargaining chip at the Firestone store to get them to match the price.

Good luck!

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2007 328i Sport, Monaco Blue
2011 X35D - sold -Space Grey
2004 X5 4.4i - sold - Kalahari Beige
2001 X5 3.0i - sold - Pearl Beige
2006 325i Sport, Sonora Beige
2000 323i - sold - Sienna Red