Mazda if I chose between those three cars. Altima 2.5 SL is 420/month on a 48 month lease in Ontario province (I don't know much about Canada) with zero down, 5-speed, and more power than any of the listed vehicles. I'm a Nissan fan.
Of course, you could lease an SE-R for about 520/month zero down as well, but it looks like you want to stick to I4's for gas mileage purposes. SE-R's in Canada and better priced than SE-R's in the states as compared to other Nissan models (like G35's/350Z's).
The SE-R Spec-V completely loaded up in Ontario province is 385/month zero down, that includes:
SE-R Spec V Sport Package $3,000.00
Power sliding glass sunroof with tilt feature
Rockford Fosgate-powered AM/FM/CD audio system (300-watt)
In-dash 6-CD changer
Nine speakers (seven locations), including subwoofer
Partial fold-down rear seat
Driver and front-passenger side-impact supplemental airbags
Anti-lock Braking System (ABS)
Anti-theft system
SE-R Spec V Brembo Package $2,900.00
Brembo�® braking system
Power sliding glass sunroof with tilt feature
Rockford Fosgate-powered AM/FM/CD audio system (300-watt)
In-dash 6-CD changer
Nine speakers (seven locations), including subwoofer
Partial fold-down rear seat
Anti-theft system
I don't believe heated seats are an option though.
