Bell Citi is good.

I also think the Giro Indicator is a great all-around helmet. Comfy, good fit, high quality construction, affordable. Get one in white for great visibility and cool temps in summer too. It even looks pretty cool (for a bike helmet) and you'll appreciate it when you get caught in the rain and the visor is keeping the worst of it out of your eyes. 4.5 stars in 300+ reviews on Amazon is no joke.