For $300 you can get a decent entry level HDTV (Just bought an LG LD350 for $330 at Amazon!) especially with Black Friday looming in the distance. Just something you may want to consider.http://www.newegg.com/Product/Product.aspx?Item=N82E16824236059
seems like a solid buy for what you are looking to use it for. Well under your budget as well. Low response time, HD, and HDMI connection. Size may be an issue for you as I do not know what you are looking for in that area.
You may want to consider LED since your budget allows it. Lower power consumption and better video quality. I haven't seen one up close and personal so I can't vouch for the claims.
Good luck with your purchase.