Best Graphics Card under $150?

I just bought a Toshiba REGZA 46XF550U off of ebay and it's going to be delivered in about a week.

I plan on using it as a computer monitor in addition to watching television on it.

My desktop is a Compaq Presario SR1834NX

I have one available pci express 16 slot

I need a Video card with HDMI output Less than $150.

What's the best I could get?