Imagine if I went into the hardware forums and, say, insisted on telling everyone asking for support on AMD CPUs that they should have bought Intel instead. How long do you think it would be until I got banned or at least ticked off?
To continue the analogy, OP hasn't yet bought AMD - he's asking about, um, what thermal paste to use. People might therefore be legitimate in suggesting that he instead consider a Core2, especially if they are superior.