YMFB,
I've just had my ST4S serviced (12k miles - so effectively its year 2 service) at a cost of 630 quid by P&H in Crawley. This is a price set by Ducati UK.
I'm surprised they said they wanted the bike for 2 days. The second service has a book time over 9 hours, but I thought the first / 6k service was less than a days work.
Having said that, they are meant to check belt tension and valve clearances, but in reality I don't think many dealers bother to do this (you have no way of knowing if they have done it or not afterwards).
I'm sure you know that the ST4 has a 916 engine, and so should have a slightly lower service cost than the 4S...
Out of your list I'd take the bike back to where you brought it.
All the best,
John.
[Edited on 10-8-2005 by John W]