Price wise for semis, you can't go past the Falken RT615s or the Federal 595 series. They have a lot of grip but very good tire wear as they are designed for road use more than track. A friend had the Falkens on his drift car for 2 years on the road (which may or may not have been used to drift on street often...) and they were gripping right till the end. the same person is now sponsored by Federal and uses the 595RSR (more top end track tire), great tires, great tread life with great grip. For you I would say the 595 Evos or the 595 RS. Thats the bang for buck tires, but for track grip, any of the proper semis will do you well.