Looking for a monitor

[Nerevar]

I've been searching through monitors for the last week and I still can't decide which one to get.

This is the setup
PCPartPicker part list / Price breakdown by merchant

CPU: Intel Core i7-6700K 4.0GHz Quad-Core Processor (£309.98 @ Aria PC)
CPU Cooler: CRYORIG R1 Universal 76.0 CFM CPU Cooler (£85.34 @ Amazon UK)
Motherboard: Asus Z170 PRO GAMING ATX LGA1151 Motherboard (£129.99 @ Amazon UK)
Memory: Corsair Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (£82.99 @ Novatech)
Storage: Crucial MX300 525GB 2.5" Solid State Drive (£106.20 @ Amazon UK)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive (£41.89 @ Amazon UK)
Video Card: Gigabyte GeForce GTX 1080 8GB G1 Gaming Video Card (£611.91 @ Ebuyer)
Case: Phanteks Enthoo Pro M Acrylic ATX Mid Tower Case (£72.45 @ CCL Computers)
Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£78.96 @ Aria PC)
Optical Drive: Samsung SH-224DB/BEBE DVD/CD Writer (£17.94 @ YoYoTech)
Operating System: Microsoft Windows 10 Home OEM 64-bit (£84.98 @ Novatech)
Keyboard: Corsair K70 LUX RGB Wired Gaming Keyboard
Mouse: Logitech G402 Wired Optical Mouse (£39.99 @ Amazon UK)
Headphones: Kingston HyperX Cloud II 7.1 Channel Headset (£72.48 @ Amazon UK)
Total: £1735.10
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-11-19 13:45 GMT+0000

I'm willing to spend up to £500-£550 on the monitor. Can squeeze up to £600 but the less it costs me, the better.

I was thinking of getting a curved one, but because I'll be using photoshop and cad, as well as gaming, decided it would be better to go with flat. Any suggestions? I'm thinking of an ultrawide 2560x1080. Preferably with gsync, but not necessary. I was also thinking about a 2560x1440 monitor but can't decide as well D: Would appreciate all suggestions that can fit these requirements.

So far I'm leaning towards https://www.amazon.co.uk/Acer-Predat...s=Acer+XB271HU

[PhantasmagoriaX]

Also, to save a little bit of money look on newegg (just found out they ship to the UK) and look in their clearance/open box section the same goes with amazon too

[Beckers]

Go for something at 144hz or has G-sync or both!

The difference between 60 and 144hz is unreal, and G-sync is amazing too.