I recently bought a GIGABYTE - M34WQ. It’s 3440x1440 so I can fit a full browser and IDE side by side. Plugs into the Mac with just a single USB-C cable, has a KVM switch so you can plug your mouse keyboard into the monitor and have it controlled two PCs. Has built in speakers. Around $420 USD. https://www.rtings.com/monitor/reviews/gigabyte/m34wq