Well, my reply doesn't have much to do with the potential upside or downside of the components. I think that if you want it, and you think you will enjoy your bike more, then yes, by all means, install the new components. You have already spent the money, and, life is short. Regarding whether your bike is more likely to be stolen, any decent bike has a good chance of being stolen. And making a nice bike like yours even nicer isn't going to make any difference in that regard. Don't let it out of your sight. Buy a beater for commuting, and use it with an expensive lock like a Hiplock D1000 or LITELOK X1, so you have a bike to ride home.