Hi im looking at grabbing a macpro 4.1 soon and trying to work out what ill need to buy with it and total cost. at the mo im on a macpro 3.1 8core 2.8ghz so id like to upgrade to something noticeably faster, i do Photoshop & video editing mostly (premier cs6 & some light AE work). Iv seen a macpro4.1 single cpu for sale locally & want advice on which cpu is best value/speed. The W3670 3.2gzh 6 cores on ebay seem to be around the £70-90 mark, will this cpu be noticeably faster than my macpro 3.1 or will i need to look at a faster cpu like the W3680 or a dual cpu macpro ? also ill need some arctic silver 5, a alan key for heat sinks & something to clean them with + the 4.1-5.1 firmware is there anything more i need to know ? i plan to pull all my HD's and GPU from my macpro 3.1 and just put them in the macpro 4.1 will i need to reinstall osx? ps im not shore if the macpro 4.1 im looking at has wifi, is it hard to install wifi?