1. Dell S3222DGM

Specifications:
Screen Size & Aspect Ratio: 32 inches / 21:9
Resolution: 2560 x 1440
Panel Type: VA
Refresh Rate: 165 Hz
Response Time (GTG): 0.2ms
Adaptive-Sync: FreeSync & G-Sync Compatible
Reasons to buy:
+Sharp image with vivid and accurate color
+Premium level contrast
+Solid video processing
+Excellent build quality
Reasons to avoid:
-No HDR
2. Alienware AW2524HF 500 Hz

Specifications:
Screen Size & Aspect Ratio: 25 inches, 16:9
Resolution: 1920 x 1080
Panel Type: IPS / W-LED
Refresh Rate: 500 Hz
Response Time (GTG): 0.5ms
Adaptive-Sync: FreeSync & G-Sync Compatible
Reasons to buy:
+Next level speed and responsiveness
+Class leading color saturation and contrast
+Solid build quality
Reasons to avoid:
-Expensive
-Requires premium hardware to maximize its potential
3. Asus ROG Swift PG27AQDP

Specifications:
Screen Size & Aspect Ratio: 27 inches / 16:9
Resolution: 2560 x 1440
Panel Type: OLED
Refresh Rate: 480 Hz
Response Time (GTG): 0.03ms
Adaptive-Sync: FreeSync & G-Sync Compatible
Reasons to buy:
+Stunning image with higher brightness than most other OLEDs
+Richly saturated color with no need for calibration
+Next level video processing, perfect motion resolution and incredibly low input lag
+Massive feature list for gaming and convenience
+Premium build quality and styling
Reasons to avoid:
-No flaws of consequence
4. Gigabyte M27QA ICE

Specifications:
Screen Size & Aspect Ratio: 27 inches / 16:9
Resolution: 2560 x 1440
Panel Type: IPS
Refresh Rate: 180 Hz
Response Time (GTG): 1 ms
Adaptive-Sync: FreeSync & G-Sync Compatible
Reasons to buy:
+Bright, crisp and colorful image
+Accurate out of the box
+Larger color gamut than competitors
+Premium video processing
+Backlight strobe that works with Adaptive-Sync
+Solid build quality and unique styling
Reasons to avoid:
-No extra contrast for HDR
-No LEDs or speakers
5. Alienware AW3423DWF

Specifications:
Screen Size & Aspect Ratio: 34 inches / 21:9
Resolution: 3440 x 1440
Panel Type: QD-OLED
Refresh Rate: 165 Hz
Response Time (GTG): 0.5ms
Adaptive-Sync: FreeSync & G-Sync Compatible
Reasons to buy:
+Stunning SDR and HDR images
+Deep contrast and color saturation
+Large color gamut
+Super smooth motion processing
+No need for calibration
+Premium styling and build quality
Reasons to avoid:
-No flaws of consequence