The big 2 in cycling GPS computers are Garmin and Wahoo, although there are certainly others. I have only used the Garmin Edge units, but Wahoo has a strong following. Probably not as inexpensive as you're hoping for, but the more you spend the better the navigation features.
Garmin Edge
https://www.garmin.com/en-US/c/sports-fitness/cycling-bike-computers-bike-radar-power-meter-headlights/?series=BRAND482#shopallcyclingWahoo
https://www.wahoofitness.com/devices/bike-computers/view-allHammerhead Karoo
https://www.hammerhead.io/collections