I'm waiting for Tiger and I'm a current Windows user. I want to get my feet wet while waiting. Which system is the best for low usage? I would like a low-cost, used system for the living room. Would want wireless internet capability. Although I use Word and Excel, for this system I would use Apple's word processor and spreadsheet that would come with the system. DVD is not necessary and I don't care if it's a laptop, iMac, eMac, etc. Recommendations?