I've been fiddling with this for a while and thought I'd throw it out there.
I bought an MSI Aegis (i7-6700, GTX 1070) last year. I love it. I'm playing pretty much everything I want to play on High or Ultra settings. Those games include Overwatch and Shadow of Mordor at the moment, but will likely stretch to include Witcher 2/3, the new Tomb Raider games and some RPGs like PoE, Skyrim, etc. over the coming years.
However, my monitor is a BenQ 24" 1080p monitor, and I feel like I'm just about ready to upgrade.
I sit at a desk, and when I play I'm usually 2-3 feet from the monitor.
The contenders, all sporting 1440p, G-SYNC:
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Dell S2716DG - 27" monitor. Lowest cost on this list. It's a TN display (which I hear should be avoided in favor of IPS)
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Acer Predator XB271HU - which brings us to the 27" Acer, which is an IPS display.
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HP Omen - 35" curved monitor from HP, but I'm a little worried about the 100mhz refresh rate
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Asus ROG PG348Q - 34" but also curved and also with a 100mhz refresh rate
So, PC GAF ... is curved worth it? Is a 34/35" monitor too big if I'm only 2-3 feet from it? Is IPS significantly better than TN? I have liked my Asus devices in the past, so I'm sort of partial to it, but the 27" monitors have the better refresh rate.
While I wouldn't mind keeping it to the lowest cost here (the Dell), I also don't want to get it and feel like it's not a significant enough upgrade from what I have. So I'm ok going deeper into my wallet if it's really going to blow me away.
The only one of these monitors I have seen in person is the Dell, at a Best Buy, and while it looks great in person, it wasn't running a game and it's really hard to tell scale at Best Buy, where the displays are in these wide open spaces.