While you're in the market for lens', why not pick up the Helios 44-2?
Before Despite tries to start something with me about this lens, I have not used this lens yet, seeing that it still hasn't arrived from Ukraine. From what I've heard and scene on here, though, it's an awesome lens that gives the picture I kind of brush stroke effect. I picked up the lens with adapter for $50.00.
Won't set you back to far.