I'm looking to buy a Mac Pro. My plan is to buy the cheapest refurb Apple are offering and then upgrade some components as required. That means it a 2010 model, with the Quad Core. I read elsewhere on the forum the best processor to upgrade to is a W3680, Six Core. However, this isn't easily available in the UK, there appears to be no stock anywhere. Is there a similar alternative? Also, the ram speed on the 2010 is 1066 MHz, is it possible to achieve 1333 MHz by swapping in faster ram? Or is it processor related? Thanks for your help.