Before I got the 428, my "finalists" were the Pio and the 42PY700. I settled for the Kuro due to the following:
1. Price. Cheaper .
2. I saw the 42PY700 side by side with a 42PV700 in Singapore. I thought the PV was better overall (but of course it could be that the PV was calibrated and the PY was not).
3. Internet reviews generally favor the Kuro over full HD models from other manufacturers.
I would have been happy with either but the surprisingly favorable price of the Kuro clinched it for me.
Good luck on your purchase.