The first thing I'll say is that wow is and should be generally be agreed upon to bottleneck in a busy situation because of the CPU. I don't know how high your fps would go as I have no experience with it personally, so you might want to hear from other people. You can probably get high frames if you turn shadows/ground clutter down but once you have a ton of things around you/fighting it might tank and perhaps out of g-sync range.
Is your current monitor 1080p or 720p?
If 1080p, your dpi is at 104.9. If 720p, 69.93
A new monitor will bring you to 89.91dpi (pg258q) or 108.79dpi (pg279q)
If you've ever cranked up the AA on your games and still seen "jaggies" in the form of physical pixel density (and been bothered by this) then the 1080p monitor might not be the one for you. It also depends on how far away you sit from your monitor.
Also, I don't hear a lot of talk about 240hz, although I do know there is a noticeable difference from 60hz to ~120+ (no idea about ~120+ to 240). Keep in mind that you don't have to hit the maximum refresh because you have g-sync, and all games might not be able to hit 165/240 anyways (wow is CPU bound in busy situations, as an example).
SO hopefully some other people pitch in about 240hz. My opinion is that a 1070 is overkill for 1080p(which is why it goes to 240hz), but 240hz is also overkill unless you're a professional gamer getting paid or something (I also don't know how much better 120/144/165 to 240 is).
I would gladly slash my fps from 240 to 165/140 for a 21% increase in pixel density(I view it as a hard cap for AA). The pg279q is a good medium of a smooth and clear display. I know I talk about dpi a lot and you said you don't care about visuals that much, but I think you get great performance at the 165hz mark and can then focus on visuals. We're talking milliseconds anyway, and you have latency from your mouse, keyboard, the internet, CPU, GPU, and brain all combined.
If @
Fascinate were here, he would probably be linking the DELL s2417dg (24" 1440p 160hz G-sync ~400$) or s2717dg (27" 1440p 160hz G-sync ~600$), primarily asking if you really need the increased view angles provided by an IPS panel. Monitor colors can, from what I hear, also be calibrated and bring you great colors, which might also not matter unless you need color accuracy for your photo/video editing career or something(they may be more vibrant than accurate on an IPS anyway). This is just another viewpoint (I own an IPS monitor btw). I personally want the S2417DG to be my next monitor ( 24" @1440p for ~122dpi)
So make a list of what you find most important in a monitor! It's your money and you can put them in whatever order you want. You also don't have a be a professional gamer or editor to want 240hz ips either
Physical size (24", 27")?
Screen real estate (1080p, 1440p)?
Pixel density (~89, ~108)?
Refresh rate (165, 240)?
G-Sync?
View angles?
Color gamut?
Response time (1ms, 2, 4, 5)?
Anybody feel free to come in here and correct the shit I just spewed out <3