Heavy climbing stands defeat the purpose for which they were built—portability. No hunter, regardless of how hard-core, wants to strap a 40-pound stand to his back, trek two miles back into the wilderness, then try to shinny up a tree with it. Aluminum stands are typically lightest and work best for those who prefer a lighter load. Steel stands are heavier, but some are still light enough that you won't want to count steel out for weight considerations alone. Aside from weight, choosing a stand size is mainly a matter of comfort. Wider stands with more padding are more comfortable for the average hunter. Depending on how far you plan to carry your stand, you might want to opt for more comfort at the expense of adding a little more weight.