salam
i own the 2nd gen. there alot of differences in both of them. 2ng G is more spacious, not as quick though, cng is possible but ull have to find a good installer, great mileage on petrol, better looks.1st g is 4 cylinder and has a greater pick, meaning faster, its been here longer thus parts are more easily available
i sugest going for the new one.. dont worry about the part because when the 1st G came out its parts weren't that easy to get either.. with the new model its more likely ull get one with less running and untouched body as compared to the old model.