Try the Denso Iridium
DVPGSR,
If you study up on the misfire rates of different plugs, you'll find that the Denso Iridium plugs outperform NGK's. I've been installing Nippon Denso plugs in Honda's since 1980 and I've never been disappointed. If you look at the heat exchange capacity and the thermal range of the Denso plugs you can't go wrong.
Spec R is right, torque to 13 -14 ft. lbs. If you don't own a torque wrench, put the plugs in hand tight and then about 1/3 turn with a plug socket.