you are pretty much spoilt for choice. If you went south there are 3 good trails at Afan and I would definitely recommend booking an uplift day at cwmcarn.
Further north people speak well of nant y arian and macclyneth, I cant help you there as I’ve not ridden them but there is a cracking ride around at the elan valley
north of there is coed y brenin which I think it still great.
avoid bets y coed, tired and outdated.
Lllangdegla in north wales is good but there is only a couple of hours riding there.