Both. As long as you can afford it, that's good. I just don't want you to post about how tires only last 10K miles (look at all the guys complaining about the OEM tires)
They are both very good tires, I like the Bridgestone more simply because I have had better luck with that company than Yokohama, you will be good either way. Just get the right size so you don't regret it like I did last year.
Not sure if you can see from the video, but you can see how hard I had to fight the car to get it to turn
http://www.youtube.com/watch?v=WTu3E66mydE
compare to my 350 on a square setup
http://www.youtube.com/watch?v=GtASpcAAxZI
Yes the cars are different and tires are different, but you can see the difference between a balanced stock car vs. a plowing stock car.