It depends on how far you want to pursue the sport. Many are spending $$ on Vudoo or RimX (Rem 700 clones) in custom chassis, etc. Bergara B14R is common and excellent bang for buck. Plenty of CZs too.
PRS22 matches are trending toward smaller targets at longer ranges 100-200 plus a few 300-400 engagements. Big issue is the capability of your rifle and especially your 22lr ammo.
Key will be finding a steady supply of 22lr match ammo that works in your rifle. Finding premium 22lr ammo is similar to chasing Berger 105 hybrids, varget, etc.
I see semiautos at NRL22 matches but have not seen any semiauto 22lr at PRS22