gosubuilder :
I wish I had gone with AMD instead of nvidia for the simple fact that freesync monitors are so much cheaper! usually $200 or more cheaper than their g-sync counterpart monitors.
And, lot more options for freesync monitors from what i've seen.
Pros and Cons to each, but FS is an attractive proposition.
While Freesync is cheaper, the overall cost of entry can be in the same ballpark..
An RX580 ($250ish MSRP) isn't going to cut it for maxed out titles >60Hz 1080p, depending on the title, of course...... CFx is a possibility, making it say $500 for GPUs and a minimal surcharge on a monitor.
Vs something like a 1070 ($380ish MSRP) + $200 or so markup for G-Sync. Less hassle with a single GPU solution, comparable/better performance (depending on the title etc), for similar enough money.
For 60Hz 1080p, less demanding titles, or gamers who are happy to lower settings etc, FreeSync can be a great deal.