I use 1600 x 1200 but newer games I have to set it to 1280 x 1024 a bit blurry at that setting and owning an nvidia card I get no HDRI graphics using Anti alising. prefair to have games set at 1600 x 1200 with no AA.
Don't worry Series 8 owners that card supports full HDRI with AA and the kitchin sink on at the same time.
it really depends on what monitor you have and what you want out of it. the higher resolutions are for people who game or work with pictures and need the better quality. i use 1280*1024 b/c i play games a lot. but the average web surfer or word processing user can use lower resolutions since they dont need the "clarity" that gamers etc. need