You need a high-definition ultra-wide computer monitor to handle split-screen work without squinting, and you want something that lasts five years so you only buy it once. A good panel changes how you work every day, but rushing into a purchase usually means overpaying.
Tech conventions drop new models early in the year, which means older versions usually go on sale a few weeks later. Wait for those price drops on last year's model to get the same hardware for a lot less cash.
Remember that the introductory window is a hard deadline, not free money; if you still have a balance left when those 18 months end, you will owe interest on the original amount from day one. Set up automatic payments so the monitor is paid off before the clock runs out.