Which Clip-On aerobar?

Hi, I’ve been lurking a while now, just recently having become interested in triathlons, and this is my first post. I’ve signed up for the Vancouver Olympic triathlon on Sept. 3rd, the bike portion of which is 4 loops around Stanley Park - mostly flat except for one short but sharp uphill. I’ve looked up the FAQs and did get info regarding this, but I was hoping to hear a direct answer to my question: which clip-on aerobar should I place on my bike? It is a mid-range Norco 24-spd hardtail ATB with an oversized riser handlebar. Or should I be looking at swapping this out for a bullhorn-type of bar, or even one of those integrated handlebar/extension bars? Those are pretty snazzy! Thanks in advance and party on, eh?!!

i had profile design clip-ons for awhile before switching to the syntace (c-2 or something like that) and I thought the syntace were better by far. I was really happy with them.