I'm quite satisfied with my AMD Sempron 3200+ 64 bit AM2 Socket processor. What I like about it is it's low price, high speed, reliability, and the fact that it comes with a three year warranty. I use my computer for hours on end, sometimes I even leave it on overnight, and I've had no problems whatsoever so far. Pretty stable and sturdy.
I'd highly recommend AMD Sempron processor because it's a great combination of value and performance, without being too heavy on my budget. It's quiet, and is good for my favorite applications, games, and work. The heatsink and fan are efficient, I never get any breakdowns due to overheating or what.
Overall, AMD Sempron 3200+ is well worth your money. Buy this processor!