I would go with Focus Sport 100%!! I have had the best experience with them. I started out with the stage 1 turbo kit, after I installed it I jumped on the dyno at my work and Randy was right there with me. I would do a pull, send my data log over to randy, and he would have a new file over to me in a few minutes. I then upgraded to the stage 2 and he was right there with me again to tweak it free of charge! After I was bored with that I threw in my build motor and and Randy got me in the 300's....FREE OF CHARGE!
Focus Sport has made me very happy with my daily driven 300whp 12 sec. car. I have nothing against Tom but this is the obvious choice. I have over 40 dyno pulls and Randy was tweaking on each one of them. I'm actually about to get back on the dyno after I get my new clutch!