Bogen 503 equivelant with a ball 75 or 100mm
 

What would be the 503 with a ball in both quality and price? Willing to pay a bit more if needed---1-200 dollars, let's say.

Cheers, Keith Kay

This doesn't really answer your question, but you could get a ball leveller which will work with a 503 -- it's called the Bogen / Manfrotto 3502 Compact Levelling Head - Ball Camera Leveller and it's about $75 at B&H.

I would think that would be 503 with a leveling bowl, like the 351MVB2 combo. The 503 is set on the flat platform of the half-bowl.