It's more of a question than a problem!

Basically i'm looking to throw on some wheel spacers on my hummer, merely for appearance, i've read on multiple websites that the cons here could be premature suspension and bearing wear. I just need to know to what extent, will I need to worry about anything for the next 2-3 years? Because I also own another hummer h3 which at 100 000 miles hasn't given me any issues with the wheels and i've had it for over 5 years. I just want to know what size spacers I should get to make it look good but also if it's worth the potential damage to my car. I've seen loads of hummer h3s run spacers these days so i'm guessing it can't be that much of an issue. Thanks for your time guys.