Hi. Im in the process to get a 2007 24" iMac with 2.8GH and 1GB Ram - I read that getting the 4GB RAM from an external source is beneficial saving one $$$$$. I checked many sites and wonder which manufacturer to choose - are there any differences as the specs look the same: 1. Crucial -> 2. DMS - > 3. OWC -> 4. Techworks -> 5. Samsung -> I guess there are more ..anyhow so many suppliers -- > I was in touch with OWC they have the OWC brand and the Techworks ---> I was in touch with CanadaRam and their generic brand is by DMS and they have Kingston Brand as well... ----> I live in Canada ... dont mind getting stuff from here or from US as long as its good quality and the people are good.. help unconfuse me pls.. Thks..