As a fellow Soldier, I'm glad you're not going to be "that guy" and get a sport bike when you get back.
Q: How good is this thing on the highway?
A: It'll work for a 25 mile commute. I've run mine in the 70-80 MPH range, so keeping up with traffic is not a problem. The bike is light, so cross winds and truck blasts are issues, but not enough to be real concerned about.
Q: Top safe cruise speed?
A: What's your definition of "safe?" With no mods and wide open throttle, I've seen 85 on the speedo.
Q: im a midget im only 5-5 so i already know im gonna need to lower the bike but i hear people complaining that are 6 foot tall.. this scares me
A: I'm 5'9" with a 30" inseam. I did the factory lowring option and installed a Yamalink. That gets it down to the balls of my feet. You can see before and after pictures here: http://advrider.com/forums/showpost.php?p=17082710&postcount=25099