My sister wants to buy an iMac tomorow(actually today since it's 1:42 AM). Anyways here's what it is: 20in / Superdrive / 1.8 Ghz. / 512RAM / 160GB / 128VRAM / AP / BT / Wireless Keyboard and Mouse Price: $1199 USD. Is this a good deal? Also, are there any major problems with this model?