I keep the bike in the end and bought a set of nice aero wheels. FSA K-Force for £700!! Discounted from £1700 I will also invest in a power2max and pimp up the bike which has never disappointed me

edited: and also for a training camp to mallorca perhaps or somewhere south.
another edit: actually I found a quarq for £1300 delivered next day, which makes is almost the same price as power2max when you buy chainrings, bottom bracket, pay shipping etc. It's also lighter and will look better with my current sram red groupset.

Thanks for advices everyone