Hi,
I have a Kanex XD for use with my iMac and PS3.
For gaming it works really well, picture quality is very good and looks great on the iMac.
Yes, it does only output 720p, but pretty much most games are only 720p anyway. Personally, I dont think 1080p gaming on a PS3/Xbox is a big deal, its a computer game and there is not as much detail as real life. I dont think developers can use the potential of 1080p on the current generation of games machines.
Pros
Works well
Looks nice
Makes extra use of a screen you paid a lot of money for
Cons
720p
Expensive
Have to plug in each time
Adds wires to the imac which is pretty wireless
Blu ray is not great
The reason I have it is because I do not want an imac and a TV in my bedroom. I wanted to use the iMac as a complete all in one- computer + tv + hifi + games.
Havnt used it much for bluray Seems ok, but when comparing to a HD its not the same at all.
Andy