Just pick up some 4.77 gears from kia if you are going to do it yourself. I have them and lots of fun. I also drive 70 miles a day highway with them. RPM's are higher but does not bother me at all. Still got like 285 miles on 11 gallons on the highway which is the same or better mileage than I got before them.

 

I have sets of stock 4.10 replacement gears if you need a set. You will need a few specialty tools to do an install your self. If you are that mechanically able then I can help walk you through an install.

 

You only got 285 or less mpg on 11 gallons with stock gears? Last weekend I got 330 on 10 gallons.

 

Hence "your mileage may vary"

 

Yeah I rack up about 40 hwy miles per day. And any whine usually wont bother me cuz my music is usually up and the top is usually down. So im open to all opinions regardless of noise.

 

i have 4.57s and i love them, i think thats the best balanced choice imo

 

Well thats highway driving at usually 80 or faster and city driving I don't really baby the car around. My trip to and from work is a nice windy road so I make it as fun as I can and have a blast both ways.
The 285 miles was with the gears. Before gears I got around 310 miles on 11 gallons.