i recently bought the EXACT spacers, but for my 1500 and the stance is awesome! they actually stick out quite a bit, every time i back up, i can see my tire through my side mirror which actually its great because now i know how close i am to a side walk lol

 

I would think the 2500 spacer would be stronger with more lugs, when its just the truck weight. I would be a little weary on towing heavy though.