I finally caught up to the end of this thread. I have the barge to end all barges:
Pelican 130T. It's 13 feet long and 35" wide - it's pretty stable but not so much that I feel comfortable standing up in open water.
I bought the tandem thinking I'd prefer not to be alone on the water, but I'm still trying to get my wife hooked on fishing. I think I went on 7 excursions my first year and am waiting for this weather to break in Houston so I can get back out on the water. I can paddle and handle it by myself, but two people make it a little easier.