I've been trying to decide on an 07 I4 Altima or an 07 or 08 Sonata V6 and it's been much harder than I thought. I test drove both vehicles. I didn't want the 4 cyl Sonata because I didn't feel it had quite enough power. The I4 Altima seems to be just enough hp and torque to satisfy my needs. The V6 Sonata definately had enough hp and torque. There are pros and cons to each car. Comparably equipped, I can get them both for about the same price. The Sonata has a longer warranty, more standard safety equipment and a little more power but also has lower mpg and higher depreciation. There are other comparision that I have found that make one better then the other that I won't elaborate on now. I am sort of leaning towards the Altima but I am still not convinced it is actually the better car. If anyone else has had the same problem deciding but did end up buying the Altima or Sonata, please explain what was the deciding factor(s).