So I bought the Croix de fer. It was the only one I could get a ride on and I knew if I got the one on the 30 day test ride from wiggle it would all go wrong!!!
Took it out for the first proper (if short) ride tonight. Luckily I am very impressed. Need to fiddle around with the handle bar position to find the optimum. But I am now content, its so much easier to hold speed than on my mountain bike which I seem to fight the whole way on the flat.
Hopefully gonna get some big miles in over the next few months beyond my normal commute to work.