Can I use 1333 MHz RAM in a 1067 MHz MacBook Pro?
Mid 2010 MBPs (7,1) with Geforce 320M are known for freezing when using faster ram. Motherboard chipset supports it, but graphics chip doesn't and OSX freezes when initializes the graphics. 

My recommendation - buy 1066MHz DDR3. If you can't find it in your local store, try OWC, it's a reputable online store that guarantees compatible ram at good prices.

ps. I'm not in any way connected with OWC.