In my opinion...the alloy aero bars from Prime Bike Components (sold on Wiggle/Chain Reaction) are the best value for aero bars.
I own both the alloy ($65) and the carbon ($200) versions. To me it's worth the little extra weight for the piece of mind.
Couple years ago I had the OG Evkin version of those EC90 bars and a minor crack formed where the bars attach to the stem. And no I didn't over torque the bolts. Cheap, Lightweight, Robust. Pick two...but you can't have all three.