I think you need to look VERY carefully at response times. Whilst the newest kit IS fantastically reliable (we have 2 * :AVALON N-16's which are AGFA, but built by Screen) - you need to factor in breakdowns, they are machines after all and subject to a million different vaguaries. I would be worried with a 6 hour minimum response myself - basic maintenance could see a tech needed a lot more than that (OK - my throughput is around 1250m2 a week per machine) , I get great service - but having 2 machines was a no-brainer.
Have you any commitment to plates - chemistry free is the Holy Grail, but lo-chem is often more practicable in terms of cost/m2, supply etc. You can get a consent to discharge your waste over here on most types too.
Sorry, loads of rambling here - but being an early adopter into CTP has given me a great (and NOT at all jaded) insight into the technology...