hello Peter
i work with catalyst and TV-ONE C2-2355A (HDSDI) and PHOENIX 2XHDSDI INPUT and it's wonderfull. no latency with video input and for Power point import it work perfect. you can connect MAC or PC in any resolution screen and the TV-one scale it and the signal is perfect.
but this is expensive like TVone:1600€ and Poenix:1900€

HAPPY NEW YEAR

YVES
Light designer/catalyst operator
FRANCE