Hmmm, for $70 more a month, I might spring for the $660 to enjoy some of the sport features
However, 590 is enticing granted its a base. If you plan on keeping it after leasing or plan to really enjjoy what the Z has to offer, I'd go with the sport.
I will say Manoir Nissan in Repentigny treated me really well and may have some good deals but I live Downtown so don't venture out there. Metro Nissan in Lasalle is where I go now.
When you get back into a Z, you should check out Montreal VQ (in my signature)