As you can probably detect from some of the comments above, there are certainly a number of "purists" here at Cadillacforums who are all about keeping their car stock, and quite a few other folks who don't get the whole "huge rims" thing. But like I said before, you have to do what feels right to you. It's your car, right? You paid for it, it's yours to play with.
My big concern with anything that changes the geometry of the suspension is that it is properly reinforced. I work at an auto parts store, and a LOT of people will come in and buy $20 worth of suspension spacers and think that these cheap pieces of chinese garbage will be enough to beef up their car to handle the bigger, heavier wheels. I beg them not to, but you can't talk a determined idiot out of doing something idiotic.
In your case, it sounds like you spent the money and did it right. All I care about is that when a person alters their vehicle, it's safe for them and the other drivers on the road around them. Kudos for doing it right, with the upgraded, heavy-duty parts.