Marcus_uk wrote:Oh and that link is to something about Curry Night

Yeah, but he's been to the pub!
Try
this oneThere is another l - o - n - g thread about the development of the system, but it takes a fair bit of reading - the link above and clicking to link to their website should be enough for now!
I can't help with the price of a standard system, but for the price of the Piper in stainless with a lifetime guarantee, i wouldn't even consider a standard mild steel one - they have a number of 'options' but if you want it to be fairly standard, the 2 1/4" system with 2 silencers is probably a good one to consider.
If you're going to Donington, there will be a large selection of options for you to listen to and look at!