Any Knee Brace/Sleeve suggestions?

I do a lot of heavy lifting and my knees recently started bothering me. Typical issues of soreness and occasional popping. This is the first time I've expereinced even though I've been lifting for a few years now; although I've been meeting PRs lately so I'm sure that's whats doing it. Anyways I'm taking a little break from heavy weights. I'm still training thought so I'm looking for something that works well for that purpose. I was looking at the copper infused ones but I'm not sure if it's worth it or if there's better options. Tons of different ones out there so any help narrowing it down would be great! Cost is a factor as well. Thanks!