What type of track are you referring to? Drag strip I highly recommend BMR, great all around and awesome for both the street and strip.
The key to a good suspension though is dampers that can support the higher spring rate and the lowering of your car as it alters the shock range. Koni orange, paired with BMR, is a great setup for these cars. I would personally get the GT500 mounts with 05-09 struts and a PHB.
If you have a little more budget, I'd HIGHLY recommend the Bilstein B12 kit. We just installed the system on our 13 Boss and have already tested it around the Nurburgring
The performance and comfort of this suspension system really surprised me.