VikingLS wrote:Also, what were the differences in the 95-99 and the 00-04 models? Anything substantial, as I am looking at hauling around a family of 4 (2 teenage boys) in the car - Thanks!
These are probably the most similar two generations of all for the Maxima. They have essentially the same engine (though the later models made more power), are still similarly designed and similar in size, and have similar suspension setups. For '04 there was a total redesign and that generation is different in quite a few ways (larger, with IRS and a more powerful motor to name a few).
As noted by MattB above, these Maximas don't have belts like your 91 did. Maximas haven't used timing belts since 1994, so you don't need to worry about that anymore.
VikingLS wrote:Also, what are major differences between the Maxima and the I30 and I35's?
What are some reasons to look at the I series over the Maximas?
Differences between the Maxima and I were 100% aesthetic. Different front and rear fascia and different trim inside and out. Both can be found with auto or manual transmissions, and in luxury or sport trim. It just comes down to which one you think looks best.
One reason to consider purchasing an I over a Maxima, though, is for Infiniti service. While there are some great Nissan dealers out there, Infiniti dealers are fairly well known for their excellent customer service. It's part of the premium that you pay for that Infiniti logo.