Thanks for all the suggestions. I generally do not like the coupled C/CT* controls but since I'll be using the 250 pretty much on a tripod I can live with that! On the other hand I couldn't live with them for something general purpose like my 80 (or a 150 that I will also be buying after the 250 which I'm almost sure will be a CFi one).
I think I'll go for the C/CT* lens, they are less than half the price of the cheapest CF I can find and thus I can afford a service and a hood and still have spare money for an A24 that I'm also eyeing. Plus I found a couple of silver 250C that just look cool.