I have heavier pipes, but I prefer those that weight 1.6 ounces or less and still have some chamber capacity, diameter and depth. As noted in an earlier post, SP and some other retail sites regularly list the weight of the pipes as well as chamber dimensions -- and many sites don't! So pay attention to the sites that do, and shop a lot there. I think window shopping as an idle pleasure helps, when you don't buy a pipe. You can learn a lot about brands and specifications. Some Kaywoodie, for example, weight about 1.3 ounces but have full sized chambers, because they have thin bowl walls that still insulate well, and they happen to be moderately priced.
I'm always surprised at how heavy some of the artisan pipes are. It seems as if a lot of carvers don't consider weight, or consider it a plus in selling their pipes ranging well above 2 ounces, some with longer sometimes straight stems that increase the leverage against the teeth.
MM cobs are generally pretty good about weight, as a brand.