I have the 650, for about 7 months. No problems and quite happy. Somethings you should know.
You can use the USB ports to view movies (mp4). Note that the port only sees FAT32, so you are limited to files less then 4Gb. There is one torrent site that has 1080p files that are smaller then 4Gb (you'll have to find it yourself).
I have a 500Gb passport (WD) hard drive USB(2.0/3.0) plugged into the 650 with 2D and 3D movies stored on it and they look great.
I have a 2.4/5.0 GHz n router but you can only use the 2.4GHz band with the 650. You can't upgrade because the motherboard only sees the 2.4GHz signal.