Raven -->
i don't see any problem running the 1600SW w/ any of ur video card. (btw, how much u would like to sell one of ur GeForce3?)
i've play some games (MaxPayne, Rogue Spear) on it. no problem when scale down to 1024x768 or 1240x1024.
and i've tested w/ some fast action movie (Driven etc.) too. u know, LCD is known for their slow pixel response time. and any imprefection will show when u viewing some fast action movie or play some fast action games (UT, Q3, etc.). as far as i could tell, it's very good. and from what i've seen from reviews, being a couple yrs old, SGI still have one of the fastest pixel response time for LCD!! and it's viewing angle is very wide too. (that's a corcern when shopping for LCD too)
the other LCD that's as beautiful as the 1600SW is the Apple's 22" Cinema Display. but......it's a Mac.
i also have a SONY 15" super slim LCD. forgot the model number. but u know, the one that's less than an inch think! it's good too. but still not as good as my SGI!
so, if u can, go view some LCD, best watch a fast action movie or games. my work Viewsonic VG150 is actually a pretty good LCD consider w/ the price tag. however, it SUX big time for me after i've got my 1600SW. i've never notice it before i've use my SGI. when u scroll down a page, it "should be" as smooth as unnoticeable, rigth? at least that's for CRT. but after using my SGI for a while, i've start seeing the Viewsonic render (refresh) when scrolling down a web page!! believe me, if u are not used too a good LCD w/ fast pixel response time. u'll never notice the other's!
for me, i would take any SONYs too. Viewsonic? for average Joe and those whose in a tight budget. the newest NEC & Samsung (those w/ TV tuner built in) might also be a good candidate too.
good luck.