Upgrading RAM on iMac

[CanadaRAM]

http://www.datamemorysystems.com/viewcat_test.asp_Q_C_E_1372

the 2 gig kit would suffice?

Yes, the 2 Gb kit will give you two 1 Gb modules. They are a reliable dealer.
If your machine is a Core2Duo, the maximum is 3 Gb RAM, so you could also choose a 2 Gb module, the DMS part number is DM50 190

(re:selling the 512s -- you wouldn't get enough to make it worth your while. Keep 'em in case of warranty repair as posted earlier.)

 

[flopticalcube]

They all look OK. You might want to pay a little extra for the lifetime warranty but they should be the same apart from that.

 

[tango554]

Those are the same people that require the "Caution: Contents may be hot" warnings on coffee cups.

I read this case. The lady who sued mcdonald's suffered third degree burns on her legs and thighs from scalding hot coffee. I like those warnings.