I'll quote what people have told me: "I've never heard of someone saying they wish they'd bought *less* bike than they did."
People often regret spending too little; you never hear people say they spent too much. Of course, you tend to talk to cyclists ... so maybe that's a tautology ...
That being said, I'm a mountain biker, so I can't give you any specific pointers as to what money will buy you in road bikes. (Probably lighter weight, better durability, and smoother shifting, same as in mountain bikes.)
That being said, are you in love with it because it's pretty or because you've actually test-ridden it and know that it will fit you? You're better off with a hybrid that fits you than with a road bike that gives you pain.
And just to mess with your head -- $2500 is enough money that the bike ought to be awfully nice -- you should be comfortable and get some awfully nice componentry -- but it's not even close to the top end of what you can spend.