I have the late 2008 unibody macbook pro 15" low-end that only comes with 2gb of ram. I want to upgrade to 4gb of ram... but not sure with which manufacture/model to go with. i read on some post that certain rams won't work with the new mbp? i want one that will work with mac os x as well as windows since i want to install windows. let me know what you guys recommend. according to the manual, i need 1066 Mhz DDR3, SDRAM PC3-8500 1.25in (3.18cm) how about voltage?