Hey guys, I've been thinking about installing a Pioneer AppRadio for my 2012 LS, however, I don't want to use the Metra kit and have my buttons removed :/ instead, I want to use this Navi & Digital Display Housing to have a more sleek look since I also don't want any of those Chinese headunits, I just want to know if there is any inconvenient and if I should use the PAC or the GMOS.