Right, I'm just making the point, gsync is fine and good, but the op may have a similar experience going with the freesync monitor, since those are usually at least about 100 dollars less. However, if you want to be sure, then yes, go gsync, but it will cost more. I will say I have an AMD Vega 56 card, and my freesync monitor had issues (I think due to the fact partially that it was HDMI/VGA only). When I returned it and got one that has DP as an option, then things have worked great ever since. Just like other things, read reviews and do your research before you buy.
As far as Intel, I would say yes, they are ahead now. But that may not be the case when Zen 2 launches out this summer.
In the case of the opening question, the 1700 is decent, but is basically last year's model. To get the performance from it, you will want to overclock. However, AMD should give a better upgrade path, especially with Zen 2 coming this summer if all rumors are accurate.
If you want the performance right now, buy the Intel system and be happy. It will perform great. Understand however, upgrading will probably mean a new cpu, as well as new board as they tend to change sockets frequently. Plus you'll pay more up front.
Really, neither answer is right or wrong here. You just need to be aware of them.