I've had luck with Gates, and I think they may also make the Goodyear Gatorback belt I have on my Jeep that's been on for over 5 years now and still isnt even cracking...

New belts always stretch, I usually warm the car up once, shut it off, and then re-tension it once it's cool enough to get my fat fingers in there!

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Current:
2021 Charger Scat Pack Widebody "Sinabee"
2018 Durango R/T

Previous:
1972 280SE 4.5
2014 Jeep Grand Cherokee Limited "Hefe", 1992 Jeep Cherokee Laredo "Jeepy", 2006 Charger R/T "Hemi"
1999 Chrysler 300M - RIP @ 221k