Dogman: I have the 2.5i and I love it. I bought it used, it's a late-model 2003 and I haven't had the first hint of trouble (knock on wood), and I drive it like a bat out of hell, it also is just my pleasure-mobile. With all the heat here in GA, I've driven it once, maybe twice, in the last 3 or 4 weeks.
When I was test driving, I also tested the 3.0 and in my opinion, the small amount of extra power (I did notice some, but too slight) was not worth the hightened price tag.
In any case, I am extremely happy with it and since it's not my daily driver, it's like new every time I take it out.
Good luck and please let us know what you choose. You'll be happy with any of them

I just wanted to add that I don't monitor my gas mileage because it doesn't matter to me, it's just a play toy.