Best affordable f1.4 lens?

I am looking for a good portrait lens for my E-P1 and was wondering what fast lenses are good.

I have a Zuiko 50mm f1.8 already, but the ghosting wide open does offer me some problems. I have to stop it down to 2.8 to eliminate that effect.

So, my question is, which affordable (And I am not rich!) prime in the 50-85mm range,