I know next to nothing about road bikes, but I'm thinking of getting one to improve fitness.
I definitely wont be racing/doing any sort of competition on it, but I guess I would use it for any other cycling on the road, including the occasional commute to work (~15 miles each way).
So where should I start looking? and would I notice a significant difference if I spent £1k versus £500.
The planet x bikes appear ( to the untrained eye) to be decent looking value.