well I run all seasons on my SVTF (summers on the mazdaspeed miata)
I am about to buy a set of these:
Conti Extreme Contact DWS
I switched the mazdaspeed Miata to the Conti Extreme Contact DW's (summer performance, but I don't drive the miata in the winter) and loved them, so it's convinced me to try the Conti DWS (all season version of the tire)
I currently run the Dunlop SP Sport Signatures. Not bad but I don't like them. The tread life is no where near what the rating suggests, my fronts are just about at the wear bars and the tires get darn squirelly and hydroplane at the drop of a hat now. New they were fine, but as they wear down the ability to shed water has dropped sharply, more of a drop in performance through wear then any other tire I have had. Overall they were fine new, but wore down waaaay faster than tires with a lesser wear rating I have had, I won't ever buy them again.
My favorite tires for the SVTF are the Pirelli PzeroNero M+S (all season version), the BFG G-force supersports were also a good tire. My friend ran both those tires on his '99 M3 as well and liked them both, mirrored the opinions too, Pirelli's were better. The Pirellis do have a stiff side wall though, it's great for steering response, but the BFG's quieted out some of the small bumps in the road. But I wouldn't call the BFG's too soft in the sidewall, I never had any problem with the tire rolling over too much on hard cornering.