Since I am unfamiliar with these posting forgive me if this all sounds repetitive..my concerns are is there ample room with the top up for enough luggage for a weekend getaway(wife and I)..also am looking for a smooth ride..trading in my 2004 Cadillac CTS(sports performance package)..also intend to install(as I did on my CTS) a radar detector..any comments. Thanks for all the excellent useful information.