The Citroen Basalt meets your three requirements very well. It has the largest boot of the lot and has a responsive engine, and is very pleasing to drive with the most comfy ride too.
The only issue is that the company's dealer network is very small; if, however, this is not an issue for you, the Basalt would do just fine.
If this is a deal breaker, then look towards the Skoda Kylaq, the boot is larger, and in general, it is more enjoyable to drive when compared to the Hyundai Venue.

