pond and stream pumps

Can any one help?

I have built my pond 8' long, 6'wide and 2' deep. I am also building a
stream which when complete will be approx 80' long. The height from the
pond to the waterfall at the begining of the stream is only about 6'. So
my question is! Would I only need a pump with a safe head of say 10' be
adequate?
I am becoming more confused the more I read on the net. And just need
some basic advice. Can someone help me please.




--
ady