I think the deciding factor is what you really want a tablet for
I wanted an accessory and port to my desktop computer, it cuts down on printing files, internet everywhere, and easy to share documents. I am not in need for a USB port simply because I have a desktop with bluetooth capabilities, and a dedicated server I can log into, and dropbox to boot
I don't see my self plugging anything into my Tab short of a USB data card, of which I wirelessly tether to my EVO, and if wireless tethering wasn't possible I would have gotten a Mifi device or dealt with an adapter.
Sure it would be nice having a port, I guess, but not worth the weight issue. I stand and walk for my job, and I never thought a couple ounces could make a difference, but a few hours into the day it sure does.