what tires for my 77 911

[SLO-BOB]

I'm torn as to what to put on this car. Right now it has Pirelli P6000 tires in 195 65 15. Considering stock is a 70 series tire I am wondering if it's ok to drop some diameter and go to a 195 60 15? How about 205 60 15? I like the light steering so I don't want to screw that up, but I would like more grip in the corners. I am considering these tires right now-

http://www.tirerack.com/tires/Compare1.jsp?startIndex=0&width=195%2F&ratio=60&diameter=15&search=true&pagelen=20&pagenum=1&pagemark=1&performance=MP&performance=UHP&performance=HP&performance=GT&x=13&y=3

Basically the Yokes AVS 100s seem decent and I've driven a 911 with them, but in 50 series. Your thoughts on this would be appreciated.