They do not make plasma's below 42" to my knowledge. So that would not fit into your description of what you're looking for.
As do the plasma vs lcd issue, its all choice. From what I've read, LCD is better in brighter rooms, plasma looks much better in darker rooms where you can control the light.
I wouldn't neccesarily buy into the "I saw it at the store its much better bla bla" argument, as not all stores know how to calibrate their tv's properly. I suggest checking out
www.avsforum.com if you're really interested in seeing the differences.