Have now tried both the Ferarri wine filter, and the Aqua-Pure (AP11T)http://www.aquapure.com.au/products/house/AP11S-T.shtml
with Xstream fine sediment filter.
Both give simular results, but the Aqua-Pure is easier to use, and quicker, and easier to clean by reverse flushing.
Both were using the pressurised keg system for delivery of beer.
So if anybody wants a Ferrari system, cheap, email me.
Norm