Originally Posted by Pinscher
I would get a better monitor than Acer with that budget. They are (atleast in my experience) a budget monitor brand. Mine (which I only have because my other one died, and I couldn't afford a new nice one) has some pretty severe backlight bleeding that bothers me and the viewing angles are horrid. Get a samsung or an NEC
Acer arent the best, however, they use similar screens to even alot of samsungs these days. All the cheaper range models use TN panels so the viewing angles will be very similar. The backlight bleeding is going to be alot better on a Samsung though. NEC are extremely good screens, but really for professional use and are quite expensive, also they suffer from alot of input lag.
If you want to get a 24" to use with SLI the Benq G2400W apparently is very good for a TN panel, great colour reproduction and at a great price. If you want something a bit more stylish the Samsung 2493HM is quite good too. The dell ultrasharp series are extremely good monitors because they use better tech in their panels, but they are more pricey as again.
As already mentioned there is no point going SLI GTX285s if your only going to use it at 1680x1050. My single GTX285 plays anything with AA at full settings at that res. Even at 1920x1200 it only sees minor noticable drops in fps in crysis warhead at full settings with AA.