Weight is important when we are talking about 10lbs not so much when we are talking about a .1lb and it also depends on where that weight savings comes from. Wheel weight makes a lot more difference than say dropping seatpost,stem, or handlebar weight. If you have the cash it takes to both drop weight and maintain the component's strength go for it. I got a good deal on some stan's crest wheels 1550grams which dropped about 1lbs over the crappy wheels I was running. Downside to that is they have a 180lb weight limit and are rather flexy in turns and rock gardens so I had to be more careful and no jumping on my full squish. Swapped those to the rigid and put 1700gram all mountain wheels on the squishy bike and back to jumping and plowing through turns and rock gardens. I can't justify spending the money for a set of 1500gram carbon wheels that are also very strong.