If someone else works on the car i'd say the Nissan...everything is inaccessable in there and parts (of course) are more expensive than for a domestic, but if it stays reliable it wouldn't be a bad car, but i'd go with the Pontiac. Either one is a decent choice.
I myself was considering getting another vehicle for driving everyday because i'm going to go crazy on my mustang (just ordered some gauges and chassis stuff...waiting for chassis stuff, then more will follow
), but if i did get another vehicle i wouldn't have any money to mod it and i'd be driving a vehicle i don't like as much, so i said hell with it, i like driving a 5.0L mustang. Do you really want to drive something else?
Good luck on whatever you decide.
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'84 Mustang 5.0 LX
My car