I have a Shark now and I love it. The orange "Ultimate Professional" one is the largest and it's huge and has tons of steam. The red one is smaller but still good steam output.
These have auto-shutoff, but it's after 15 minutes, which is long enough that it works for me. It doesn't take that long to heat up even if the auto-shutoff has kicked in.
There are a LOT of topics that come up over and over again, but you never know when there will be something new on a topic. If I'm sick of a topic, I don't click on the thread (I don't have time to read them all anyway). I would still recommend searching the archives, because some threads end up being better than others.