Quote - What, if any, off-the-shelf dynamic hair products would people recommend?

Check out Adorana's free dynamic hair http://www.hortipedia.org/adorana/2011/?p=111 which is certainly (imo) better than any of the commercial products.

Poser comes with some pretty decent strand hair for the internal figures that can be easily fitted to any character.

Check out Carodan's posts here and at RDNA on drastically reducing hair width and increasing density. This is essential! You may also have to increase your pixel sample render parameter.

All available dynamic hair shaders (that I have found to date) are rubbish! It's something I'm working on...