For the past 5 years, most performance enthusiasts have agreed that the Michelin Pilot Sport PS2's are the best tires for your warm weather driving needs. Between then and now, many other companies have taken their best shots at the PS2 tires and few managed to reach its level.
I have run the Michelin Pilot Sport PS2 tires on my 2004 Audi S4 Cabriolet for the past couple of summers and can attest to their greatness. I've been really happy with the blend of performance and overall ride quality. I've found the Michelins to be fairly smooth riding and very quiet for a max performance tire. In the past, getting a great handling tire meant you would have to deal with an extra harsh ride and lots of tread noise. That's not the case anymore!