ASUS ROG Strix 27” 1440P OLED Gaming Monitor (XG27AQDMG) - QHD, Glossy OLED, 240Hz, 0.03ms, Custom Heatsink, Anti-flicker,Uniform Brightness, G-SYNC Compatible, 99% DCI-P3, DisplayWidget, 3yr warranty

WOLED uses a stack of white-emitting OLED layers with color filters to produce red, green, and blue subpixels, which can limit brightness and color purity due to light absorption. However, WOLED has the advantage of being more mature, cost-effective, and widely used in larger displays like OLED TVs. QD-OLED emits blue OLED light and converts it into red and green using quantum dots, resulting in higher brightness, better color accuracy, and improved efficiency. Overall, QD-OLED delivers better color saturation and brightness compared to WOLED, especially in HDR content. » ASUS ROG Strix OLED XG27ACDNG – 27", QD‑OLED, 1440p, 360 Hz. Best‑in‑class 360 Hz QD‑OLED with vivid colours, KVM and 90 W USB‑C which are really nice features. Matte finished. » MSI MPG 271QRX – 27", QD‑OLED, 1440p, 360 Hz. Includes DP 2.1 and 90 W USB‑C plus KVM which are nice features. Early firmware updates fix high input lag but sometimes VRR flicker persists. Good firmware support in general. Glossy finish » Alienware AW2725DF – 27", QD‑OLED, 1440p, 360 Hz. Great value with 360 Hz and deep blacks; Has HDMI 2.0 and a Matte finish » LG 27GX704A-B – 27", QD‑OLED, 1440p, 240 Hz. HDMI 2.1. Very solid mid range pick that can be usually found for under $500. Glossy finish. » Gigabyte GO27Q24G – 27", WOLED, 1440p, 240 Hz. Glossy screen. Has some VRR flicker and red‑tinted greys. One of the most budget OLED monitors. Usually can be found for under $400 » ASUS ROG Strix XG27AQDMG – 27", Glossy 3rd gen WOLED, 1440p, 240 Hz. Another solid pick from Asus

I personally have an Asus XG27AQDMG, which goes for about $550 on Amazon. However, the world of OLED is a broad one. I specifically chose this monitor because it's W-OLED (as opposed to QD-OLED) and it's glossy (as opposed to matte). It's really hard to make a decision without seeing them in person, so I went down to my local BestBuy to see the differences. It's all personal preference, so I can't really recommend the "best" OLED panel for you. As for the refresh rate, I don't really see an improvement over 144hz. There's a slight improvement, but you have to look pretty closely. Whether or not you choose OLED, I wouldn't count on 144hz vs 165hz+ making a big difference - I would focus on the other features of the monitor (VESA compatibility, screen size, resolution, etc).