Hi, I'd like to upgrade with AMD and I've research a little but I'm still doubtful... I currently have 2 pcs, the main has Q6600@3.2GHz and I'd like to upgrade the second one with some AMD cpu (because I already have an AM3+ motherboard) but I want it to be really faster than kentsfield build, in order to turn it into main pc, ok.- According with this chart, the new cpu should be at least 3 tiers higher than my OCed Q6600. My recent hystory with cpu upgrade has been as follows... X2 firstname.lastname@example.orgGHz E7200@3.3GHz Q6600@3.2GHz ????? (still looking for) All these changes have been only 2 tier higher than previous cpu, but I really noticed the difference when applied some oc. 3 tiers higher than Q6600 means that upgrade should be something at i5 2500/2300's level but there's not something like that so far in AMD area. Options? A)I was thinking about Phenom II X4 975 (2 tiers higher) which cost 160$. B)But X4 955 can be found at 112$ and it can reach the 975 by unlocking multiplier, right? C)Or maybe X4 960T at 125$ and apply some OC, in addition it can be unlocked to X6. D)I also want try a new FX cpu but I don't want to spend over 160$, so FX-4100 at 130$ could fit into what I'm looking for but there's too little reviews of it to compare it to X4 975. E)Wait until AMD releases new FX models (or drop prices of current models) and compare again. Please, help me to decide beacuse I don't want to buy a new cpu and get the same performance that I currently have. Thanks in advanced PD: Plaese Try to avoid suggestions like "i5 2500k or something"; beacuase I have a Am3+ mobo that I really like and want to keep it and use it.