I wanted Wifi, so I bought a D-Link DSM-520 probably a year ago.
It's one modern weakness is it can't do .mkv/H.264 --the new DSM-750 does that now, and I might be tempted eventually. However, it does DivX/XVid excellently, and upscales to 720p through HDMI quite nicely. I use it both for movies, and for seasons of television; I usually stream from the system in my sig. I have it hooked up to a 42" Panasonic plasma, which has been an excellent television; this November we'll have owned it for a year, with no problems.
When MPEG-4 displaces DivX/XVid completely, I'll transition. For now, it hasn't been an issue.
Intel Q9450 @3.2GHz, Gigabyte GA EP45-UD3P, 4 x 2GB G.Skill @4-4-4-12
Antec P160SW case (modded), Xigmatek 750w PSU
3x 500GB (RAID-5), , OptiArc 7200S, ASUS E818A3T
Creative X-Fi XtremeGamer, Hauppauge HVR-1800, Radeon 4890