I still think Garmin has the best ecosystem (Connect), so the Edge 130 for a budget computer. I have used a Bryton computer in the past too that worked just fine if you're on a tighter budget, but it does use a propriety mount (not compatible with Garmin or Wahoo).

There are also lots of Chinese computer available in the $40-80 range, but my issue there is that their mobile apps to auto sync to Stava and such have real questions about data privacy that are not worth the cost savings in my opinion, but you could just use them the old way with a USB cable sync.