Very Good em13, now I have something to work with!
I know it's a bit over budget but buying a bike is like buying a house, you need to get into as much bike as you can! Based on your answers and future plans to better yourself (btw congratulations on going to college!! I worked my way through college also, electronics engineering.) here's what I would choose:
2008 Specialized Allez Triple, (here's a link to the web page)
http://www.specialized.com/bc/SBCBkModel.jsp?spid=32192
It runs around 800.00 but that's what Specialized sells it for. I'm sure a local bike shop will give you a decent discount, especially if you're paying cash.
The other bike for you would be the 2008 Trek 1.2, (again, here's a link)
http://www.trekbikes.com/us/en/bikes/2008/road/1_series/12/
This one has MSRP of 769.99 again, good solid entry level bike that you won't outgrow in six months. Now, it's very rare that you will find a LBS (Local Bike Shop) that carries both brands because they are both pretty exclusive of each other. Don't be afraid to ask for a test ride!!! Don't be afraid to ask for a test ride!!! Don't be afraid to ask for a test ride!!!
Did I mention don't be afraid to ask for a test ride? Think it's important? You bet!! It's your hard earned money we're talking about here and I would hate for you to buy a bike that doesn't feel right because then you will absolutely hate it!! What you're looking for is comfortable positioning, ease of operation, and the feeling that you can really get into it. Ask questions!! Ask questions!! Ask questions!!
Since both bikes are about equal in components you will have a pretty solid idea of what you're getting. Personally, I prefer Specialized but then again I'm partial to them because that's what I ride (lol). So, I hope that I have not overwhelmed you with information but based on what you told me I'm able to weed out the junk that's out there and save you a whole lot of time.
DON'T GO TO WAL-MART AND BUY THAT GMC BIKE THERE, IT IS JUNK!!!
At Wal-Mart you buy bikes to re-cycle, what that means is that you buy it, you use it, you throw it away. WithTREK or SPECIALIZED you're getting maximum bang for your buck and you can upgrade components later if you wish.
Good Luck and Good Hunting!!
Luis
P.S. Welcome to the riding world!! Always wear your helmet!!