Tbh if you really want to unlock that 5090, you should look at the Gigabyte AORUS FO32U2P. Most people just look at the 4K 240Hz spec and call it a day, but this model specifically has full DisplayPort 2.1. Since your card actually supports that higher bandwidth, you can run max settings without needing DSC (Display Stream Compression). Its a small detail that makes a big difference for long-term ownership because you arent dealing with those weird compression artifacts or alt-tabbing issues that sometimes pop up with older port standards. Ive been through plenty of monitor upgrades over the years, and the motion clarity on these new QD-OLED panels is just on another level. The 5090 is finally a card that can actually saturated a 240Hz refresh rate at 4K in most titles, so you really want a panel that can keep up. The colors are punchy and the blacks are perfect, which makes a huge difference in immersive single-player games. Its definitely the sweet spot for a top-tier build right now.

ROG Swift OLED PG32UCDP is recommended.

ASUS ROG Swift 32” 4K OLED Gaming Monitor (PG32UCDP) - WOLED, Dual Mode (4K 240Hz, FHD 480Hz), 0.03ms, G-SYNC Compatible, Custom Heatsink, AI Gaming, 99% DCI-P3,True 10-bit, USB-C 90W, 3yr Warranty

• 32-inch 4K (3840 x 2160) WOLED gaming monitor with versatile...
• ROG-exclusive OLED Anti-flicker technology helps reduce the...
• New AI Assistant provides dynamic AI Crosshair, AI Sniper,...
• Optional uniform brightness setting ensures consistent...
• DisplayWidget Center allows users to easily access OLED Care...

Buy on Amazon

Facts.

Within your $1,500 budget, the ASUS ROG Swift PG32UCDM stands out, featuring a 32-inch QD-OLED panel, 4K resolution, 240Hz refresh rate, and exceptional color accuracy. Alternatively, the Samsung 32" Odyssey Neo G8 offers similar specifications with Quantum Matrix Technology and a 1000R curvature for immersive gaming. Both monitors are excellent choices to maximize your gaming experience.

SAMSUNG 49-Inch Odyssey G9 (G95SD).  https://www.amazon.com/SAMSUNG-Compatible-FreeSync-Ergonomic-LS49DG956SNXGO/dp/B0DHJ7VBJ4?t=t=7649-20

Alienware monitors.

Alienware AW3225QF