My 1st floor family room has 42" 720p HDTV with 5.1 sound system. The recently done basement dedicated HT has 130" 1080p HDTV screen (via Sony VPL-VW60 projector) with full 7.1 sound system. Here's my thinking: Apple TV for Family HTroom, MacMini for Basement HT room. I appreciated feedback/other viewpoints. Usages: Family room w/ AppleTV: iTunes audio content, viewing family DVD's made with iMovie/iDVD, viewing iPhoto. Currently just Oppo DVD player in family room, no Blu-ray there yet. Don't plan on surfing the web in family room. So, the Apple TV is a nice hub to my existing content stored with my basement iMac, that's it... >>Family room is via wireless Basement HT room with MacMini: iTunes audio content, viewing family DVD's made with iMovie/iDVD, viewing iPhoto. I have PS3 for Blu-ray/games. Plan on using the MacMini for web browsing and viewing some HD online content. I'm not sure on the whole HTPC thing or not. Might get into that at later date. >>I had wired cat5e for fast access to internet. Other: Just purchased a 2TB external hard drive to use with my 24" iMac (750GBHD, 4GB RAM), which is in the basement and connected to cat5e network. My thinking is that iMac is the organization/storage of everything, running 24/7. Content is streamed to AppleTV/MacMini as needed. I've not bought these yet, but really soon based on feedback here.