I will use it with my PS3 but I posted it here because you guys make nice machines for gaming purposes.
Could anyone name me some thing I need to know before buying one.
Size doesn't matter but I am a teenager so I have limited budget - 100 pounds as max.
Please don't shut this down cause I think this is apropriate considering that I will play Skyrim with this.

A good monitor with HDMI for ￡100 isn't the easiest thing to find, but the http://www.lg.com/uk/monitors/lg-IPS234V-led-monitor is reasonably close. It doesn't have any speakers though, but there's a headphone jack on it so it shouldn't be hard to connect it to a sound system or just use headphones.

Thanks for the fast response mate. Lifesaver.
EDIT. This really is affordable.