Cycling plus bike of the year depends on which bikes they test during the year. And is probably influenced by advertising revenue too.
It is very difficult to buy a bad bike for that money, but some will be better than others.
I agree that 105 is adequate for almost everyone and prioritising wheels and frame is a plan - which in all honesty suggests Ribble or Dolan and their bike builder options are a plan as few pre-built bikes share that opinion
There is a massive flaw in the logic of buying a bike based on it being the one that is available rather than the one that suits you best
It's a good time to buy as a lot of stores will be selling off 2014 models.
You could also build up something from Ribble based around the R872 frame (read the reviews it's the same as a much more expensive De Rosa), ultegra groupset and quality wheels for well inside that budget.