We'll be buying a 27" iMac soon, and am wondering if the basic off the shelf configuration will be ok. I suspect it will, but don't want to under buy if there are important factors I'm overlooking. We do tend to keep tech for a long time, but are moving to Macs from PCs. Most activities will be fairly basic, with some Photoshop, MS Office. We will also want to be able to run Parallels to get to some legacy PC apps. We don't do exotic things like 3D rendering, After Effects, or processing of huge files. We might want to play movies on the iMac though. For comparison, our most up to date current machine is a 3 year old Sony laptop with 2 GB ram, a Core 2 Duo 2.2GHz processor, Windows Vista Home Premium, and a 225 GB HD with 85 GB free.