Ah, an area that I have experience in. I had the conair steamer and really liked it. It has a fairly large tank. Then I saw another one on a great sale so bought it thinking I would give one to my mom. I never decided which to keep and seemed to alternate. Then I saw the Rowenta on sale. It is this one
http://www.thebay.com/eng/home.....bay/201811
It has a good sized tank and a few handy attachments including one for putting the crease in pants. In terms of utility, the two benefits I appreciate most are the cloth covered hose and the coat hanger that is built in.
I used the Rowenta for a few weeks and then gave one steamer to my mom and one to my partner Tony. He now steams his t-shirts and dress shirts.
Hope that helps.