I personally will be going with the Nashbar TT bars in 40cm width on my IRO group by frame. On my other two road bikes i spend nearly 95% of my time on the hoods or the top of the bar only using the drops to sprint or when descending. I figure i won't miss the drops too much since i won't be tackling any major hills with the fixie and i can get low and aero enough even with my hands on the brake lever hoods.