I believe my comp and video card is strong enough to run everything wide open as most of you said it would. I do have the hi res pack and everything up as high as it will go with the shadows off.
I would do as FLS posted, TnDep
also, in the advanced graphics settings in the game, I would not go any higher than 4096 on the textures .........and that size will start choking your PC/VC down ....... you might be better to go no higher than 2048 ( your PC will not handle the 8192 shadows/textures setting..... your FPS will plummet )
in the start up screen click the video settings and set your AA at either the 2nd notch or 3rd notch, I would not go past the 3rd notch setting ( going from left to right ) this also will cause your FPS to drop the further to the right you go
if you are using the Catalyst control center to set up your videocard, again, do as FLS posted and start out at the lower settings /default and then increase them incrementally.....
as far as using 512 textures verses the hires 1024/2048 texture package......... you should be just fine using the 1024 high res pkg.... you just need to tweak the antistrophing and AA and other adjustments...... but yes after some slight tweaking you should be able to run at a steady 59/60 FPS at 1920x1080 res.......... unless you do as you posted and completely max everything out.....
hope this helps
TC