You might also want to try the Barton core 2500 by AMD. You can get them for about $90. They run at 1.83, which is about the same speed as a 2200, but the former runs at 333 fsb, while the latter runs at 266 fsb. This helps bring up the performace. The 2500 is also very easy to o/c because of the relatively low clock speed.
The 2600 you like will run at a higher clock speed (ie more heat), but since the fsb is set at 266 in stead of 333, there is a marginal performance increase.
You may also like to take a look at the Barton 3000. It's come down a lot in price since the 64 bit processors came out. It's fsb also runs at 400, which really gives the chip a boost.