Thanks for the feedback. It sounds like there is a lot of praise for the 545 PC taps but that stainless will always last longer.
In my searching for the perfect tap I cam across these
http://www.micromatic.com/draft-keg-beer/taps-faucets-pid-4933ROTO-V.html
While they are not cheap they are stainless and if not specifcally forward sealing must be a close approximation. It also looks like they have upgraded the design on their flow controller from the ones Qld Kev had problems with. The main issue with these would be that they don't seem to be tried and true but at around half the price of cellis for a SS flow control tap I wonder if they are worth a look...