Advice on a 2k sportive bike

Hi, this is my first post.

I am currently looking at getting a new bike having just sold my trek madone. I want something that has a more relaxed riding position as my back is getting worse as I get older!

I also have a Cannondale cyclocross on a 51cm frame and that is quite comfy for me at 5ft 9, but is now a few years old, so I want something new for good weather. I am torn between the Cannondale synapse 2015 or a Ribble Gran Fondo.

The Cannondale has a mixed groupset of ultegra, fsa and standard brakes with Mavic Aksium wheels and it gets really good reviews. It is currently going for 2k, but may go down in price when the new 2016 models come out in the next month or two.

For the same money though, I can get the Ribble with full ultegra DI2 groupset, deda kit and either Mavic ksyrium elite s wheels (25mm) or Fulcrum Racing 3 wheels.

On paper the Ribble is fantastic value for money but I can’t see any recent reviews of the gran fondo so I’m not sure about it, but for the money, I can’t find anything else to match it, and it looks really good too!

I won’t be doing massive miles and comfort is my main priority. The problem with the Ribble is they won’t let you ride any of their bikes as they say they are all built to spec. I find this a bit unreasonable as I only want to test the ride position which won’t be overly affected by spec.

Any views would be appreciated.