I figured someone actually using one would have replied by now... Anyways, it is possible to use a Med. res. monitor, under DOS you need to use MonArc 24 (I forget which site had that, but a search on Google should pull up the page).
Under Windows, Powerstrip should be able to get 24kHz out of most cards, but YMMV. From what I've heard the Matrox G400 dual head cards can do it using the card's driver.