I am considering buying a new serious pack--but for short trip useage (no longer than 3-5 days). But I am torn between the hardy military surplus stuff that can be had for $60 at Cheaperthandirt.com and other such places, and the $90 and up stuff that are available from SierraTradingPost.com, etc. made of new colorful material that is supposedly light, strong and wonderful. What is with this ultralight fetish now? Is everyone wimping out? I have carried a weighed down Alice Pack in my younger years in the service, so know them well. What do you use or would you choose?