Does Media Center run slower on secondary monitor in extended mode

Hello!
Does Media Center run slower on the secondary monitor in the extended mode?
Is there any video player which runs on the secondary monitor in the extended
mode as fast as on the primary monitor? Can anyone run two monitors in the
mirror mode in their two different native resolutions?
How to make Windows Vista Media Center component run on the second monitor
in the extended mode always? I want to buy a video card with outputs for two
monitors and connect its d-sub output to my HDTV Samsung 32R71B and use it as
a secondary monitor in the Extended mode in its native resolution 1366x768
or 1360x768. The primary monitor should remain in its native resolution
1280x1024. I want to watch video files on the 32R71B and control the playback
from a remote control. Which remote control should I buy?
Best regards,
Dima
+79035093892