WG D9800 kicks ass.
I've heard mixed things about Makvisions, we threw a flat CRT one in our DDR a couple years ago and it still looks fine. *knock on wood*
for the price involved, I'd probably go with the Wells.
another thing to note, FCC regulations prevent manufacturers from making standard resolution monitors in 25". they actually come out to 24.8" now, which probably doesn't sound like a big deal, but your existing 25" bezel won't fit it right. the Wells D9800 is a tri-sync.