I recently bought my first smartphone(!), a BQ A4.5, pure android, always updated, with 5 years of guarantee(!) by 150€. I recommend it: good battery, good western design and enough performance for me (low resolution with a good screen improves performance).
I have a BQ E5 Ubuntu Edition(running android now) that I got nearly 1 month ago. Hardware has been okay so far, this phone has ram trouble with ubuntu touch.
It is okay running android, a little under powered I think.