Both good coolers, go with the 120
It wont OC like a single core, but its not bad from what i have read. It will OC to what the top end X2s are.
Chaintech VNF3-250/A64 2800+/1GB(512x2) OCZ VX GOLD 2-2-2-5/BFG 6800GT/Thermaltake 420W/WD 200GB/Maxtor 300GB/Soon to include Z-5500...any ideas on which SC??