This has probably been hashed over here 1000 times. But I'll be getting a used 2010 (late) iMac i5. It has an onboard 1Tb drive. I'm getting it for free and want to boost the ram. And, since it has a Thunderbolt port, I could really get modern if I could configure an SSD boot drive. Who sells them? OWC only carries iSata SSD drives. The prices at Newegg were pretty scary. Any cheaper source for a 128Gb SSD?