Im not sure if the PCH A200 supports Blu ray files but i think it does. I believe it can also accomodate a standard HDD right? which i think is a plus for mobility and lesser power consumption.

Xtreamer can accomodate up to 500 gig mobile HDD and with its price, it is more attractive to budget conscious buyers. I think Xtreamer relased 2 new products which could accomodate standard desktop HDD which are more expensive than the sidewinder.

WDTVLive is small and sleek, only drawback i see is that there is no room for internal storage.

PCH firmware support is good, same with xtreamer, Im not sure about WDTVLive.