I think the most important piece that I don't see enough people wearing are impact shorts.
I picked up a pair of Dainese and its been great so far.
I wear my Fieldsheer undersuit over the shorts, so the suit moves around my body easily...
There's a bunch on that site and gives an idea, The Damon hard tail looks like would be perfect.
http://www.allsportprotection.com/Mens_Padded_Shorts_s/513.htm
just saying, i think shorts are more important than a brace...at least in my previous experiences.
I think the bottom line is, whatever you get. you must feel comfy enough as to not notice it at all on the track.
There is such a thing as over-doing it, restricting yourself and movement and feel on the bike.