first choice is this. I know the money issue but you asked for advise and I will give you to straight poop.
Choice 1. 2x SSDs in raid0
http://www.newegg.com/Product/Produc...82E16820233075
Choice 2. 2x WD raptors in raid0
http://www.newegg.com/Product/Produc...82E16822136296
Choice 3. 2x 32mb cache wd 500 @ 7200 rpm.
http://www.newegg.com/Product/Produc...82E16822136320
The third one is in your price range and is 32 mb cache. This compensates for the decrease in motor speed. Plus both of these are a nice little tera-byte. Yum....
Choice 1. 2x SSDs in raid0
http://www.newegg.com/Product/Produc...82E16820233075
Choice 2. 2x WD raptors in raid0
http://www.newegg.com/Product/Produc...82E16822136296
Choice 3. 2x 32mb cache wd 500 @ 7200 rpm.
http://www.newegg.com/Product/Produc...82E16822136320
The third one is in your price range and is 32 mb cache. This compensates for the decrease in motor speed. Plus both of these are a nice little tera-byte. Yum....