Retro fit Di2

Renewed my frame this summer but kept with trusty 105 groupset which is around 15 months old. With the price of the Ultegra Di2 now less than £1000 should I give myself an early as pressie? One bike shop suggested I sell the current bike and put the £1000 to a new bike albeit a 2014 version with Di already fitted as this might be cheaper than a retro fit or at least be a better bike for the same money?
Are there other options, just upgrade the deraillers etc and leave crank, brakes and cassette alone?
Are there other options, just upgrade the deraillers etc and leave crank, brakes and cassette alone?
Dolan Mythos and Her dirty sister
http://imageshack.us/a/img689/926/photojun07195556.jpg
http://imageshack.us/a/img689/926/photojun07195556.jpg
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If you like the new frame - I'm guessing you do as you have just bought it - a retro fit is a good idea and I would definitely buy the full groupset. The new Ultegra chainrings are good (if not that pretty) and the new brakes are excellent (and very pretty).
Di2 6870 is just a joy to use.
Boardman FS Pro