This summer I bought a small, portable Janome Hello Kitty machine from Target.com. I love it. It's light-weight, cute, and high-quality.
If you're looking for a nice portable machine for classes, this is a great choice. It's also a great machine to keep around for when your main machine is in for service or when you have a friend over to sew.
Hope this helps!
Chris
www.frecklemama.com