Like IslandPlaya says, the Quest 2 is probably the best choice. Its relatively cheap and can do PC-powered and standalone VR. If you have a pretty modern gaming rig, id recommend a Reverb G2, because its the best PCVR headset ever made, second to none. As a cheap alternative to a G2, Rift S was the gold standard before Reverb G2 came out, and you could probably get one now for like 1/3rd the cost of a G2.