I've been researching the market for a while and came to the conclusion that CT would be the best. It shares the same drivetrain as Prius and Auris but it has much better interior with possibly a slightly harsher ride but it has a somewhat luxury interior.
I've been doing my research for the last 3 months and I have noticed that once two to three weeks a gem pops for sale but it goes so fast.
My 2 cents: go for 2014 or 2015 if possible as their piston and piston rings got updated to avoid possible head gasket issues. That doesn't happen so often in the UK anyway.
I'm also coming from a manual Jazz (which has been the most realible car ever yet) so I can't wait to pull the trigger.
Beware the second hand market is going up. The same specced CTs are about 15-30% pricier now compared to 6-10months ago.