I'm planning on upgrading memory in my iMac to 512MB. I found this:

http://www.crucial.com/store/listparts.asp...Hz%29&submit=Go

Do you reccomend that manufacturer? Non-parity, is that good? The module is exactly two times less expensive than the one at the Apple Store.

By the way, do you know any online store that ships to Europe?

No, it's not the best deal: http://dealram.com/prices/systems/24617/512MB.html

Anyone on the page is good. I have memory in my iMac from 1-800-4-Memory, and it's been rock solid.

Parity doesn't matter. You shouldn't have to worry about it, as an iMac isn't really a server