I recently bought a new truck since my old car, which was still running fine, was getting up in miles and it just wasn't worth it anymore to pay for maintenance. It was more practical at this time to buy a new car, which I had the resources to do.
I say this not to be bragadocio, but to point out the excitement I get for seeing the fruits of my labor. There is nothing wrong with being proud of your accomplishment. You can certainly do this without showing off. Work hard, and also enjoy the rewards.