I recommend EVS 100%. I have used knee guards and then asterisk, but only ran EVS Web Pro knee braces for the past 6 years. Carbon fiber and are very comfortable. On my second pair cause I broke a pair with a handlebar crashing in the whoops but they definitely saved my leg lots of times. Can get a huge discount through Hookit. Also never ride without the "TUG Fusion" knee brace socks either. But a lot of it is personal preference since legs are all different shapes.
I just ordered the DonJoy prefab one for some $500. I was measured for the fit etc. it looks pretty nice; a more durable design than my Breg. Ten day delivery time. The custom one was $300 more but is gauntteed forever.