The £1400 to £1600 price band has a bewildering choice of bikes in it.
I was recently in the market for a training bike in this price range and weighing around 8kg (to match my ‘summer’ Rourke). In the end I boiled it down to a short list of three bikes I liked the look of, a Boardman, a Raleigh and a KTM.
The Boardman looked good, well spec’d and with lots of 4 and 5 star test results. I was not able to find the Raleigh I was after, and having managed to test ride the KTM, I bought it.
The Cube looks OK, nothing horrible on the spec sheet, but nothing special either. If it’s your first ever road bike, then I would strongly advise slinging a leg over one, or something similar and getting some idea of what size bike will suit (mtb’s and road bikes are sized very differently). If it’s definitely what you want, then look at a few reviews and provided the frame is not made of bendy cheese, get it.
Like I said though, there is a LOT of choice at that price.