BeHardware - Monitors
Read it, best place you'll find online to learn about panels. A monitor choice isn't a light one. You should go to a local store and look at monitors there to decide on if you prefer 22" or 24" and the pixel density that comes with those choices. I find 24" pixel density to tight and the fonts a bit smallish because of that, so I got a 22". It's very much a personal choice, so check it out.
Samsung is nearly always a safe bet and they generally produce the widest used panels as well.