The Gorb is a very well designed heat sink and losing out to Alpha FCPAL-35t by only 2-4 degrees. The success is due to the good heat sink and mounting mechanism design. Thermaltake also uses the best thermal compound available. (The white staff shipped with the HSF.)
I also found that the Gorb twisting clip to be better than the Alpha clip. The Gorb mounts perfectly flat on the CPU on every MB and slotket that I tried. On the other hand, the Alpha clip mounts slightly uneven on some slotket if the tabs on the CPU socket is not at the correct location. On those slotket, the Alpha actually performs slightly worse than the Gorb.
Tyical performance of P3-700 oc to 980MHz at 1.65 Vcore: (Deg above case temperature)
Golden Orb: 20F idle, 38F full load
FCPAL-35t: 18F idle, 34F full load