Cool, might be a good way to do it. We pretty much selected the people we chose based on quality rather than price, so might not necessarily be best for you as you're not looking to stay more than three years (I didn't know that). But always good to get more quotes/talk to more people I think.
We're going to go with a Royal system for the very reason you've said @Airhead
@Fox I think I might give that chap a message as we're still going to want some fitted cupboards