Graphics card for a tv

Hello,

I plan on using my PC for high def 1080p movies using an HDMI. I'll be plugging it into my 42'' LCD tv. I don't play games on my pc. So with that being said here are my questions.

1. What's a good graphics card for a large tv? I know that small monitors need less but I'm assuming a large tv should need more..? Price should be reasonable...
2. Should I plug my HDMI cord into the HDMI output on my motherboard or use the one coming from my graphics card?

I'm using an Intel Core i7 2600 cpu with a Asus P8Z68-V PRO/GEN3 mobo.