Best Thermal Paste for H80?

I am using my H80 cooler on an Intel Core i7 970. I plan to upgrade to the new Haswell-E 5820K and will have to clean the existing paste with Arcticlean.

I have always used Arctic Silver 5 in the past. Is there anything better?

Also, do I just put a dollop of paste in the center of the block or lay down a thread?