Hi and welcome to the Teryx forums. I just bought a Teryx 2 weeks ago after many many hours of research. I am happy I bought the Teryx over the other brands, despite the Carburator. Also, if you buy yours in the local that you live in you shouldn't have to adjust it at all because it should be set already. You may also want to know that Kawasaki will be making the Teryx Fuel Injected in the near future, probably the 2009 or 2010 model years, so you may just want to wait a bit. Anyway, below is one of the websites I used during my research that gave a fantastic side by side comparision of the different UTV's out there, including the Ranger. I suggest you take a look. I am not affiliated with any brand of anything, so I'm not going to try to sell you anything... It is a lot of money to spend on a toy, so it is best to be sure!.
Also, the Teryx is far from perfect, so search around the threads a bit, it won't take long to find the "dirt". There is a thread somewhere on this site about changes that Teryx owners would like to see for future models, that may be a good place to start.
Anyway, once you make up your mind, please drop a line about what you decided to purchase!
One other thing, the Teryx has 2 bucket seats, not a bench, so if you want to take your wife and daughter along, you will need to convert the bed into 2 additional seats and extend the rollcage out.
UTV Guide - UTV Model Comparison