Hi All

Just wanted to see if anyone has tinkered with 'seriously' big sound and/or visual systems in panel vans etc. I know many are purists who want to stick with original equipment radios, but i believe in the best audio/visual you can possibly afford, so what has everyone done in their vehicles? Anything crazy out there? What about massive systems that hide inside classic looking vehicles? What A/V options would people want in this modern era? Cloud based media? Wifi hotspot? GPS? Theatre? Google Now? Nightclub lighting systems? 8 track?

Any Ideas?