I would also recommend checking out non-cycling specific rain jackets. Ones for backpacking usually have the best cut, but can get really pricey. I picked up a nice one last year with an ample hood. Just be sure to buy a size you can layer under, but not turn into a parachute in a headwind. And most preferably, go and try some on with your bicycle helmet and try turning your head in the riding position to make sure your neck isn't too restricted.