the best wraps on the market (HANDS DOWN!) are made my apt http://www.prowriststraps.com ive been using them for years. superior quality to everything else =)
I feel like wraps are not the best option for non-competitive lifters, they give a false sense of security, sometimes contributing to injury. Same reason I dont use a belt, if it cant be accomplished without pain, most likely somthing is wrong, form/too much weight etc.
I just recently squatted 405 cleanly after having my knee reconstructed with a 6hr surgery 2 years ago.
So it REALLY depends on your level of technique and strength. Make sure to try to spread the floor with your feet and force your knees OUT.
You may not be sitting back far enough causing your knees to travel over your feet, putting the fulcrum of tension in your knees instead of ham/quad.
I'd check your form first, check out some good sites like westside-barbell.com or elitefts.com , read articles and youtube forms.
I did invest in some knee sleeves just because I'll always be nervous going heavy on my knee.
Hope this helps TL!