I had the same dilemma a few months back, and ended up going for the Q5. I couldn't justify the ridiculous price of the evoque, and found it slightly female orientated.
The X3 I just couldn't get to grips with. I wasn't satisfied with the overall product, and thought it could have been much better. Ended up ordering a Q5 S-Line Plus 177 with most options and it came out cheaper than both the X3 and the Evoque, for IMO the best of the bunch.
Bring on April
Edit: Mike in Hampshire - Lead time on the Q5 for me was more like 3/4 Months...