I have 2013 xc tour and want to replace the speakers. I have read a ton of stuff but don’t want to change the radio or add an amp. The polk 5.25 speaker which got high reviews is no longet available. My local store tells me the only thing available in a quality 5.25 is the rockford fosgate. Has any one tried these? If so was the sound improved at all. Do they bolt in wiyh no mods? Thanks for any input