Just had my seat covered with suede, it looks and feels so much nicer than the standard plastic, less moving around of the bottom.
I bought a piece of Alcantera from a company found on the net (
www.peacockfibres.co.uk) for £12. I then got a local upholstery to cover it for me for £15. It's worth shopping around as the first one I tried wanted £48 to do the same job.