I dont know why people are advising the op for buying amd cards from the moment he states he is waiting for pascal. Obviously he wouldnt touch an amd gpu with a 10ft pole with that kind of claim.
Basically everybody says waiting for Pascal and a bunch of them mean it as waiting for the next generation. I don't even know if I've seen anyone else say they're waiting for Polaris even among the guys we all know are buying AMD if they're even close. So I can see people recommending AMD right now because there are some really solid performance picks in there.
However, the OP's getting a gsync monitor, which leads to three options, which are something cheap that fits in that $200 budget like a 960 or 950, something that can be sold used after depreciating $200 or less, or going all in because it'll be a while before big pascal.
I'd be personally tempted to go for something like a used/B-stock 970, since they've already had a lot of the depreciation they'll see and still offer good performance, and especially in the case of a B-stock 970 or used card with a transferable warranty, the shorter warranty won't be a big deal for OP's timespan with the card.