I like triumphs, but that is too big of a bike to start on. First and foremost, take the MSF safety course. I don't know how it works in other states, but in IL, you sign up [it's free, $20 refundable deposit], they give you a bike, and teach you everything you want to know about riding motorcycles. It takes a weekend, and then you go to the DMV with your card, get your M liscense without having to take the test [you take it in the class] and then you get an insurance discount. Don't buy new for your first bike, because chances are you will drop it, knock it over in the Garage, etc.
I know a big part of motorcycling is the image, and everyone likes the big, new, sporty bike, but you really shouldn't start there. Start small. I suggest a Suzuki Banit 400 or 600, or a Suzuki GS500e, if you like the "naked bike" look. If you want fairings, go for a Suzuki Katana 600, or a Kawaski Ninja 250 or 500. My first bike was a Katana 600, and it was dropped 3 times. Twice just sitting on the bike, and once at speed. I am glad I didn't pay too much. People don't see motorcycles, and they are quite dangerous. They are a helluva lot of fun though, and in the hands of an experienced and aware rider, the risks can decrease. Do a web search for the MSF course in your state, or most motorcycle dealers have the information, or know where you can get it.

Good luck, and if you get your bike, ride safe.

*edit* I just noticed you said you were a senior. I went to school with a kid that got a bike for graduation, a Honda Blackhawk 1100. He didn't live a month past graduation