I can't believe I'm actually looking to replace parts in my PC, but after ordering a new 23" Samsung 1080P monitor, I'm thinking I should replace my video card. That 4850 looks pretty nice, but will it provide a significantly higher performance than my current EVGA Geforce 9600 SSC? My main concern is that with a 1080P monitor, I may not be able to run my games as well without dropping below native resolution. I've read that running lower than an LCD's native res can cause horrible image quality.
I'm just wondering if the 4850 would be sufficient to then run everything at 1080P at about the same frame rates as I get with 1280x960 on my current CRT. That seems like it would require at least a 50% increase in fill rate. My system is pretty much unchanged from when I rebuilt it last fall, that being a Pentium Dual Core E5200, 4GB RAM, WinXP SP3.
Also, is the difference in size between a 17" 4:3 and 23" 16:9 enough that I'm not going to be straining my eyes on regular applications and text when running at 1080P compared to 1024x768?