Why are so many of you preening over these PI's like they're athletes? I fully understand that who you've worked for and where you went is certainly something to keep in mind post-graduate school, but seriously. Find a school you can get into, and pick the PI with whom you'd be happiest over the next 5 years. If that means being a 14-16 hour hard-worker (lab slave), go for it. If that means finding a human that'll let you stick to 40-50 hours, have a life, and have free time to serve as an excellent mentor, then go that route.
In any event - don't look to others for their opinion, because those are certainly not going to reflect what you personally feel.