I couldn't agree more with this. I'm 5'9", average build and 42cm bars are probably just fine for me, but I love the feel of 44's. I switched the bars on my training bike from 44's to 42's and I could definitely feel the difference when out of the saddle. My race bike will stay with 44's.

Also, does anyone know if they make a 43cm bar? That would be sweeeet.