@Nate75:
1) FreeSync IS that good, you should definitely go for FreeSync (though my experience is only with 144Hz FreeSync)
2) FreeSync shouldn't pose a significant price premium, if any
3) It is the G-Sync that brings the price premium
Could you list some of the 144Hz monitors you've been comparing? If you're looking at something like
Acer GN246HLB
AOC G2460FQ
Acer Predator XB240H
then please remember that those are 24" and TN (!!). And they're practically the same price as the Acer XF240H, which IS FreeSync. So no price premiums!
Generally speaking, there are five major price premiums:
Resolution (2560x1440)
Refresh rate (144Hz)
Panel type (VA and IPS)
Size (27")
Variable refresh rate (G-Sync -- whereas FreeSync is practically premium-free)
I guess it kind of depends on what your budget is, and which features you value most.
For example, the Acer Predator XZ271 is pretty hard to beat: curved 27", 144Hz, FreeSync, VA, £300. Unfortunately, it's universally out-of-stock. Not sure if I've ever seen it on stock...? There's an almost identical alternative, Lenovo Y27f, but that's £340 (but can be found on stock -- not by OcUK, though).