Didnt someone start this thread a while ago. I wouldnt recomend getting a dog. If you're about to start flight training dont change anything in your life that will require more of your time.
Let me preface this by saying that I have three dogs....and two cats but I don't like them. Don't be afraid to get a dog because you are afraid that you won't be able to study. Get some self control and understand that its ok for the dog to lay on the floor in front of you while you study. Come on people...
That said...
A dog could limit your ability to take cross countries and sometimes they really piss off roomates who can help you study but not if they move out because your dog keeps pissing on their stuff.
Don't get a dog if:
1. You are dead set on getting a puppy and don't have a fiancee or better who wants one too. They are tons of work, and require a trip to the weeds at least every 2-4 hours to be fair to them. Repeat after me...puppy with your work committment + no support = disaster.
2. You don't have someone closer to you than a roomate to look after it when you are gone. The bottom line is that even if you train you dog very well, there are things that you have to put up with that only a dog person can tolerate forever...dog hair being a bigger problem than IPs on your bag etc...
Two things you posted make me think you haven't thought this through enough...
1.
There is something to be said about an animal that loves you and in return all you have to do is feed it. Way less maintenance than the girls i've dated.

Dogs are way more work than women...ever clean up your gf's crap?
2.
I floating around in the A-pool and was thinking of picking up a companion over the weekend, something in the boxer variety.
Doesn't sound like you've been planning this for long. A good rule of thumb on a first time major purchase is to think about the purchase at least half as long as you have to live with it...dogs live about 14 years. There are exceptions given for previous ownership...:icon_wink
Good luck