Hello everyone, i have the standard 256 mb in my 17" iMac, and i wanna throw in another 256. 18004memory.com has it for $26 and seems to be dropping by the day, while crucial is charging $90. i've only heard good things about crucial, nothing about 1-800-4memory. my question is is there a quality difference between the two, because 26 dollars seems a lot more appealing. ill probly wait till it drops a few more dollars, but has anyone had any problems with 18004memory?