I quite fancy having a go at fitting my own tyres and balancing them,from what i've seen on the 'how to' on www.ducatisti.co.uk it's not too difficult and the kit would be paid for after 3 tyre changes.
I've bought loads of bits and pieces from them in the past for various bikes. You don't get the specialist knowledge you might get from a smaller shop but their systems are good and the stuff is well packed.