Hi, I have been gone a long time; sorry I've been very busy with school and tests. But here it goes. I am trying to make a decision, between which to go with. The Koolance Exos 2 off ebay used in perfect condition for $50 or the Thermalright Ultra 120 Extreme. The Koolance does not come with any waterblocks, but I am going to buy a Swiftech Apogee GT block. Now my question is, which one should I go with. I currently have a watercooling system, but its not so good; KingWin AS-3000. The CPU that I plan on using this on is in my sig; Opteron 180 @ 2.75GHz. Which would give me better temperatures, I want temperatures under 50 Celsius, as the Opteron's max temp should be 59 Celsius. With the current watercooler it gets up into the low 60s. Any advice, need some asap, since I need to make the decision quickly. Thanks