I have base with sports and I love it. Lightest Z with the most performance add ons (from factory). If leather and bose stereo are NOT in your priority list, then just wait for your car to come in.There are simply too many goodies included in a sports package (i.e. SynchroRev match, lightweight 19" rays forged rims, bigger brakes, LSD, spoiler etc).
Welcome to the site btw!