Need new rear tires and could use some suggestions. I commute 80 miles to and from work and drive up to 80-90 miles/hr at times. So probably will easily end up wearing out a lot of tires. I live in Fort Worth-Dallas, TX so temperatures can get up to 100 degrees easily at times during the summer. And I also need a tire that can handle rainy wet conditions, but rarely does it snow here, and if it does I take the SUV to work instead.
I'm sure others have their own favorites, but... ... my favorite is http://www.tirerack.com. You can compare multiple tires against one another by price, treadwear rating, M+S (mud and snow) rating, etc. It's a terrific site, and I landed not only a great set of tires, but they shipped them directly to a competent installer (you can choose your installer too) then put them on my vehicle. I live in the DFW area, and I decided that I don't see enough mud and snow to justify changing my tires twice a year for separate M+S and summer tires, so I simply bought a set of all season Yokahamas (I forget the specific tire model, but they cost me less than $300 for a set of 4). Look for a tire with a higher treadwear rating, and keep them properly inflated according to the manufacturer specification. A road hazard warranty is a handy option also. Try to get the same size all around if your wheels permit it so that you can rotate them, and make sure your alignments are up to spec. Highly recommended.
Well for what's its worth (and it's probably not worth much) I bought a set of Sumitomo tires for my recently acquired 530I. These are the 3rd generation version which were getting very good reviews for wear compared to their newer model. I only have about 1000 miles on this but they are a very quiet tire and the grip if also very good. I was a little hesitant about buying them since I never heard of them. But they fit my budget, the review were positive and so far they are performing up to my expectations.