looking for 2x4GB sticks for my iMac in my sig, I have no experience with upgrades whatsoever, so im looking for some opinions from you guys who know a lot more than me. im looking to spend around the £50-£65 mark on some 2 x 4GB sticks i have these so far that look reasonable http://www.amazon.co.uk/Corsair-204...F8ZG/ref=sr_1_7?ie=UTF8&qid=1304789814&sr=8-7 http://www.amazon.co.uk/Komputerbay...TDPI/ref=sr_1_1?ie=UTF8&qid=1304789814&sr=8-1 http://www.crucial.com/uk/store/partspecs.aspx?imodule=CT2KIT51264BC1067&cpe=pd_google_uk would all of these work in my imac? What are your opinions on these? would like to know what experience you have had with brands, also are there better deals out there?, would love to know. thanks.