IF you can tell us your budget , we can get a good setup.
You can also get help from Raj , Ilango and Ramie , all are ICE experts!
A JBL 4-channel amp costs around 8.5k and JBL woofers cost around 5.5k. And add 2k for good quality wiring and another 2k for enclosure of the woofer.
Does your Pio HU have 3 RCA outputs?