Buz2b: Snatchface was making the comment that a while back, AS5 was on sale for $5 shipped. I'd rather have OCZ 5+ than Ceramique, but in the grand scheme of things $2 more for a superior product (AS5 or Shin-Etsu) seems worth it to me.
Of course, if you don't have *any* thermal paster around right now, get *something*, because bottom line is: you need to have it if you want the lowest possible temps.