Any heatsink suggestions for a passively cooled Celeron M 410?

I have an HTPC which I wan't to be fanless. I think one of the tower coolers won't work as well because the heat travels up and the fins are horizontal. I was thinking of the thermalright xp-120 (fins look really close togeather) or the Zalman al-cu 7700 (I think a better option). Anyone have some suggestions? I'd like something cheap but effective.

bump

i would go with the zalman, i have had good experience with that design.