This past August, I rented a U-haul trailer and towed my '15 GT, when on the u-haul website, the trick is to pick the right conditions, the weight is critical, I picked the higher one as my build is rated for a 13,000 lbs. trailer
I have the optional B&O in my XLT, like any good system, you have to work in the speakers, once they are worked, the sound is awesome for a factory system (I have had systems built before)
I have Recaros in my Mustang, did a number of long drives, the longest being from Toronto, Ontario Canada down to the tail of the dragon, I feel that what I paid for them (custom factory order) was worth it, if you like being hugged, then the Recaros are awesome.