While the 650 has been upgraded to the 660 since I bought it, all I can talk about is the 650 and what I can say is that if you want a powerhouse machine, the QOSMIO is a very good choice.If you are looking for a gaming machine, there are better choices. If you are looking for an entertainment center, this is an outstanding choice. It has an integrated TV tuner, and can play HD-DVD disks. It also has an HDMI port so you can connect it directly via the best path with an HDTV.I would call this a semi-portable home theater so if you spend a lot of time on the road, this machine lets you take your entertainment with you. The Harmon Kardon speakers are great for playing music and the HD-DVD player produces stunning movies.