I'm heading up to the apple store to buy a new iMac with the 3.06 Ghz processor. Comes with two gigs of RAM. I will expand that myself to four, since apple seems to charge way to much for an upgrade. Any recommendations on who is selling "matched pair" 2 gig chipsets, and for what prices and is a reliable supplier? I'm thinking OWC... Others? Thanks! Uh...what do I do with the pair of 1 gig chips I take out?