I was trying to post a picture but can't.
I to was tired of the crappy radio on my Laredo. I put in a Samsung soundbar with sub hooked to the tv. It sounds great, and will fill up the camper with sound. You can also Bluetooth to it. I left the 4 ceiling speakers in place and just don't use them.
For the outside, I haven't done this yet, but I have one in my boat, and a good friend good this to his open range.
https://www.amazon.com/gp/aw/d/B00VV6Y7O2/ref=mp_s_a_1_3?ie=UTF8&qid=1515167897&sr=8-3Ï€=AC_SX236_SY340_FMwebp_QL65&keywords=gauge+boss+radio&dpPl=1&dpID=51zWKCWw0TL&ref=plSrch
Put this radio in just inside one of the outside compartment doors. Then replaced the crappy outside speakers with Polk audio speakers, and rock out. It really sounds good. For satellite radio, I'm guessing you would have to get it on your phone then Bluetooth with these options. When I'm camping I usually listen to Pandora it my Google play music account.