falken ST115 are awesome wet tires, and good dry tires. they wont outgrip AD07 or hankook R-S2 in the dry but will do so easily in the wet. still below performance of GS-D3, PS2 or S-03, but those are way more expensive.
ST115 is much quieter than ES100 or other similar range yokos.
wears quickly but grip and low noise levels remain til the bottom of the thread. the yokos are known to get noisier after 50% wear.
if u intend to track the car, u can overcook and kill the rubber of the ST115 if ur not careful. so i dont recommend it for track use. but for day-to-day use, especially in the wet, there's not much better rubber u can get at that price.
oh, i hear the toyo proxes T1-R are quite cheap, too, and would be a better alternative than the ST115. if u can afford the slight premium, go for the T1-R. i wont recommend the GS-D3 cos the thai rubber is shite and u cant get the german made ones easily anymore.
redd