I am in the same boat as you for the not a big fan of vegas but I have to go there fairly often for work
I will say that Mandalay...even in the regular section (as opposed to THE Hotel tower) is great and there are some really good resteraunts there...since you are younger (I am assuming this because you are still in college) you may also want to check out a place at The Palms it is a blast and if memory serves the nicer suites with the strip view would be in your price range, the conciarge(sp) floor at the Monte Carlo is sweet just try to get a strip view as they are building a new tower on one side so all you get there is a view of the Luxor and a damn big hole not a total baller suite but it has a key protected floor, private lounge and floor conciarge that can get tickets and reservations almost anywhere...I would agree with the statement of maybe cut corners a touch on the room and go all out with a spectacular dinner I can provide some resteraunt ideas if you want a few...depending on what she likes.

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