Road bike recommendations

you have illustrated the problem of buying online when you have no idea of your ideal size/geometry.
once you know this a quick look at the geometry chart for that model will be all you need.
you could always go to a proper shop and get fitted but then you might end up paying more for the bike but obviously getting more in return.

if you find a shop with that model in the size you think you need then at best you will get a quick sit on it but if it's unbuilt that isn't going to happen. is it really that much of saving when for a bit more you can get fitted properly and probably get the stem swapped to your ideal length too.

Yep good point. My bike arrived at the weekend and having ordered it online I had not ridden it before I received it. I found a Cannondale size chart which gave a frame size of 58 for someone 6'0" to 6'2", a 60 for 6'2" to 6'6" and and 62 for 6'6"+.
As I am 6'2" exactly, I was between the 2 sizes so I done a bit more research that suggests if you have longer legs to body ratio, as I do, you are best off with the smaller frame so I went for the 58. Never having ridden a road bike before, I really don't know if it fits me properly yet, though it felt bloody fast on this mornings commute and comfortable. I believe that you really need to ride a bike for a while and get a feel of it before you can start changing bits and making adjustments. It took me ages to get my track bike exactly the right fit. Swapping stems and bars, but that is what the forum is for :)