24" is nice samsung are good - you should research it
22-24" dell, hp, viewsonic all make good ones
so do other hanns, ausu acer -- can be had for $200-$250
find a sale and research it
when they rank them the difference get lower evey year
there are different typle of lcd even different types of TFC or TFF - maximum pc has article this month on lcd's and explains some of this
22" are 1600x1100
while 19-20 and 24 are 1900x1200
even 1200 lines are good
30" are 2500 these take high end video cards