Drag radials? On the road? Ought to replace all four tires and use the radials for the track... sayang.

Bridgestone Potenza AR10 - No experience
Goodyear Assurance FuelMax - Won't balance with the drag radials... these are economy tires.
Michelin XM1 - Avoid like the plague. Terrible braking, wet or dry
Pirelli P6 - Too expensive for what you get
Yokohama C.Drive2 - Good tires
Dunlop LM703 - Prefer C-Drives, but not bad

If you want something that will balance the grip of your rear tires, Advan Neova AD08s may do, but cost a lot. Also consider Federal 595 RS (not SS or Evo) as these are R-comp tires (cheaper than the Neovas, but treadwear isn't great) and should balance the drag tires well.