Actually, I agree with you that 3 rigs is about right. I have 2 now, and my Bro. has 1 that he runs BOINC on for my ID, but right now only 2 of the three are fully functional. That is why my RAC is so low today. If you want to go AMD route, nothing wrong with getting an AM3+ mobo now, and then upgrading to a Bulldozer CPU later. I wish my mobos would allow me the upgrade, but alas, it appears I will be buying new mobos down the road... which mobo do you want now? Maybe we can find you an AM3+ mobo that is similar in spec and price, and then you can just sell the x6 CPU later when you get a bulldozer, or move it to another rig that has a smaller CPU at that point. Just some thoughts...