What's the best PS2 emulator?

I want to play the PS2 games Backyard Wrestling 2 and WWE Smackdown vs RAW 2008 on my PC using an emulator. I'm hoping to install an Nvidia GeForce 8500GT 512MB PCI-Ex graphics card and currently my PC have 1GB DDR2 RAM and a 1.8GHz Intel Pentium Dual-Core Processor. If I installed My graphics card then... show more I want to play the PS2 games Backyard Wrestling 2 and WWE Smackdown vs RAW 2008 on my PC using an emulator. I'm hoping to install an Nvidia GeForce 8500GT 512MB PCI-Ex graphics card and currently my PC have 1GB DDR2 RAM and a 1.8GHz Intel Pentium Dual-Core Processor. If I installed My graphics card then what's the best PS2 emulator to play the above mentioned games?
Update: I want to play the PS2 games Backyard Wrestling 2 and WWE Smackdown vs RAW 2008 on my PC using an emulator. I'm hoping to install an Nvidia GeForce 8500GT 512MB PCI-Ex graphics card and currently my PC have 1GB DDR2 RAM and a 1.8GHz Intel Pentium Dual-Core Processor. If I installed My graphics card then... show more I want to play the PS2 games Backyard Wrestling 2 and WWE Smackdown vs RAW 2008 on my PC using an emulator. I'm hoping to install an Nvidia GeForce 8500GT 512MB PCI-Ex graphics card and currently my PC have 1GB DDR2 RAM and a 1.8GHz Intel Pentium Dual-Core Processor. If I installed My graphics card then what's the best PS2 emulator to play the above mentioned games?
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