IMO the base 6 speaker system is great, but I play all music from my iPhone through an aux cord. I don't have an answer to your question about the panel but if you could provide details to your new speakers and amp that would be awesome!
'11 Laredo / Bright Silver Metallic / V6 / QT1
40% windshield tint, 20% front sides, 255/70/17 GY Wrangler AT Adventures, 5000k LED interior and reverse lights, K&N drop in filter
Audio: Pioneer AVH-X1500, Alpine MRX-M55, Rockford P3-12"