I love GSync and 144hz.
That said if you do go 144hz, don't get the RoG Dominator, get the Acer version for £50 more if you want Freesync, as the Dominator's Freesync range is only up to 90hz.
You can very safely mod the Freesync range on that one to get it to 144hz (but it will require increasing the lower limit).
Imo Kuuwahi, I don't think you can get enough wow-factor from any of the monitors under <1k compared to your current Asus if you don't go for the 4K ones. The choice to me is this: do you do a lot of "desk" gaming (i.e. CS:GO, DotA 2, RTS games, etc.)? If so, 144hz will be a good idea. Do you play a lot of couch games? If so, go for really big screen and get as immersive as possible. Plenty of 40'' 4k monitors to go around, one even with Freesync (Wasabi Mango). If you do a mix of both, forget it, wait a bit more and save a bit more. Right now I got a BenQ BL3200PT and it's perfect because I do both, though I would have loved to have Freesync as well. In the future though I'll go for a combo 24'' 144hz for competitive gaming + 55'' 4K TV with Freesync for immersion.
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