Do not get knee wraps. Knee wraps allow you to lift more weight than the joint maybe structurally capable of handeling.
Also if they do provide support when lifting, what happens when you don't have them on?? - they encourage improper motor programs and reduce strength & muscle coordination for the muscles don't have to work as hard to stabilize the knee joint.
Wraps should only be used in competition or at the very end of pre-comp training when you are doing a max single. not when doing reps etc. just like a belt.
S