@ftp1020, I'm sorry, I misunderstood you. I thought you meant that the 3200 overclocked much beter than the 3000. I have never really dealt with a lot of the higher models, as the 3000 is kind of at the sweet spot for power for the money (especially since prices came back down to what they were before).
I just thought of something too. Talk about a nice overclock. we helped DJMind overclock his 3000 and he got to just over 2500MHz, stock cooling and everything!!! Of course he may have to sacrafice a little to get the memory right (not sure how that turned out), but forgive me if I am wrong, isn't the 3000 1800MHz stock, so 2500MHz is quite a nice overclock, no voltage increase, very little temp increase.
Also, about looking to the future when upgrading, I couldn't agree more, especially with power supplys. If you need to buy a power supply, do not get one that is big enough, do not get one that is a little biger to allow some upgrading, get one that is big enough to power anything that you could fit in your case!!!!!!!!! I have gotten slammed a little for this, but a good power suppy will last so long, you will be kicking yourself in a year or two if you don't get the big one. Save a few dollars now, or pay a lot more later.