I might be crazy but im giving serious thought to selling my 05 and buying a newer 06/07 Z with around the same mileage. Its likely going to cost me £2.5-3k in the process
Reasons:
Mine is silver, with the opportunity i could switch to Black, Grey, Orange any of which id prefer
Better engine, and on 313hp models its also mounted lower for better center of mavity
Handling reportedly a lot better
RE50 tyres already on the car, as opposed to me upgrading them myself from the crappy RE40s
Already has the LED rear headlamps, again rather than me buying them as an upgrade
Headlights are Bi-Xenon
Fob can actually be set to open both doors, rather than constantly annoying my passenger because I forgot to blip it again to unlock theirs. Also adds opening boot and winding windows up/down from remote.