Best video card the money

I assume that an HDMI telvision-out port transmits in at least 720p but would like some assurance from users and pro's. I'm looking for a secondary HTPC video card to run a tv and second monitor. a video card that will run my second monitor at 1680 X 1050 and distribute 720p on the HDMI port? I'm nervous about ATI's AIW, my first one a couple of years ago was a terrible software and driver experience.

My goal is to send the 720p video signal over a multi-channel modulator to my structured media panel and then transmit to all my 720p+ televisions throughout the house using amplified RG6 distribution.

Thanks in advance