There are tons of thermal greases and compounds out there. I've noticed Arctic Silver has some of the best reviews. Thoughts on Ceramique vs Arctic Silver 5?
I prefer Ceramique for most applications, but you may see better temps with unlapped surfaces using AS5 (ever notice how some people say AC5? ). My compound of choice is MX-2 however. Just as easy to apply and dielectric as Ceramique but performs almost as well as Liquid Pro (gallium metal). Not to mention it's fairly cheap for 3.5g.
I agree any of the better ones will do fine. AS has a website the tells you the difference and where it is better to use one vs the other.
Proper mounting and application (good footprint, not too thick) is probably more important than the exact brand/type as long as you stay with a major manuf. that is well reviewed.