HDTVs are not particularly high resolution in comparison to LCD Displays. 32-37" have native resolutions around 1200x700, and they should not require dual channel DVI. So from purely a data throughput point of view, the HDTV should be a piece of cake for most video cards. But HDTVs work with only a very limited number of resolution and sync parameters and your video card driver may not support them. Look into switchresx to create custom video settings and this tutorial:
http://www.avsforum.com/avs-vb/showthread.php?t=751713
but, be careful! improper settings can damage your tv.
i have a samsung 32" and i go dvi to hdmi with a radeon 9600xt. I have to use overscan to fill the entire screen, but it looks great.
good luck