Not many pc monitors support 24hz unfortunately, the ones that are tv/pc monitors usually do, however for best results id go with a 32" tv, i have a sony o picked up for £300 in the sales, and it supports every refresh rate youd need. Just fyi, if you want this for movies and stuff, make sure you differentiate between 23.976 and 24.000hz, as i think both ati and nvidia list 23.976 (the more common one) as 23hz in their options and obviously 24 (the less common one) as 24hz