PCSX2 has god awful compatibility with AMD. Its not that AMD is a bad processor (mine runs spore, sims 3, WoW, AoC, etc just fine), but PCSX2 was apparently not programmed well enough to support more than 1 processor. I get 40-50 fps (which is only approximately 80% of what u should get), which makes the emulator awful to play on. So if you reeeaaalllly want/need this emulator to work, you're better off getting a intel. A 2.4 ghz intel (dual core) should do well enough according to my friend (PCSX2 does not want to run my 2.6 ghz amd dual core to full potential).
Often I'll be getting low FPS and my amd processor won't even be using more than 50% of its power. Also any questions related to PCSX2 getting stronger support for AMD are apparently falling on deaf ears (most likely because the programmers don't know how to solve the problem).
So, bottom line, AMD processors are great, and it SHOULD be able to run this emulator fine, but PCSX2 is a unique situation since somewhere along the years its been developed it started to only run well on intel computers (no clue how, and the developers don't seem to have a real reason either). And don't get an AMD with the hope they'll lend support to it anytime soon.
Solution: Go with the more expensive intel chip if you want to use PCSX2, because trust me its not playable with an AMD.
Also, ignore the technical jargon the mean nerds were posting above. In my 10+ years of working in the IT industry I have never come across such abstract cross-processor compatibility issues as this emulator seems to hold (when using the same operating system).