if u want style reliable/cruzer go for the crossfire it has a decent amount of power for a daily drive.
Go the 350z if u want power.. as for the service cost i would say they would be the same.
if you want to mod your car the crossfire has limited choices there are big options for the 350z
the mr2 is a great little car but i think has been dated and wont nearly look as good as the crossfire / 350z\

do a coin flip or test drive both cars i guess as said before its a personality choice gl.