Honestly though if you are spending the money to build a new system, it seems a shame not to spend the extra $$ to get a card that can produce a solid 60 fps at AH's default graphic settings (which I believe include all POST lighting effects, shadows, bump mapping, reflections, etc) - at the most common gaming resolution of 1080p. To me that seems like a reasonable target performance. If you find you don't like lens glare, bloom, or reflections, etc, you can always disable them individually. Environment mapping also has a sliding scale I think between 0-4.
I think the 4Gb RX 480 and the 3Gb GTX 1060 can both handle this for around $200, plus or minus $10-$25 depending on the brand you get and the deal you find. The next step up would be the 6Gb 1060 at around $250 or so, depending on the same factors of brand and whatever rebate or special might currently being offered.