Er, DVI
is an HD input, hell, so is a D-Sub connection for that matter. You can buy TV's that are full HD and only have either component or DVI connections, but they're still HD.
And before any one says "yeah, but you need HDMI to play HDCP movies", you don't, DVI is HDCP compliant.
<edit> If you really want a quality monitor that has more inputs than you can shake a stick at, grab yourself one of
these for the bit of extra cash.
</edit>