I know this topic is old, but in case someone comes along looking for the same info:
I've been riding a LONG time. Here is what I know.
Nylon has come a long way in terms of protection, but it has problems with keeping you cool when it's hot, and keeping you warm when it is cold. No matter how strong the weave, the space age material it is made of, etc, it will not offer the same level of protection as a good set of leathers. I am not married to brand name, I check each piece carefully for quality and fit. I have a yamaha star touring jacket, Triumph leather pants, Harley Davidson boots, and a couple of different sets of gloves.
The more padding in your gear, the better. I speak from experience. Padding on the knees really helps, padding on the elbows is basically a must.
Choose pants over chaps. I know I am going to get a tremendous amount of flak over this but I'm going to say it anyways: Chaps are for strippers. The two areas where you need the protection the most is totally exposed with chaps. You might think jeans will offer enough protection where the chaps stop, but you would be wrong. Unless your wearing the new motorcycle jeans (I still have my doubts) then jeans are not going to offer much protection, especially at speeds over 60 km/h.
A good helmet is a no brainer.
I was involved in a head on accident on the highway. Two broken ribs, some whiplash, ankles a bit messed up, messed up a tendon in my calf, but considering what would have happened without good leather top and bottom, I ended up in pretty good shape. NO ROAD RASH! lol.
Hope it helps someone down the road.