If you don't leave town and can limp home, buy a cheapo if you like.
If you have access to a covered, heated place to work on your car anytime you like, buy a cheapo.
If access to the part is not an issue, buy a cheapo.
If you don't have a family to protect by avoiding their being stranded, buy a cheapo.
But, I had an alternator quit at about 35,000 miles. Plymouth POS. Bought a reman Plymouth from the dealer, probably equivalent quality to O'Reilly etc.
In the next 40,000 miles, the alternator quit 4 times. The first time the reman quit, the car was wrecked because it should have been in another place, which it would have been if it weren't limping.
The last time it quit, I was actually driving to the parts place to get another alternator. Totalled at 78,000. I took the insurance check and ran.
JM