I have something similar to this ebay item. No It's not me selling this, I'm just giving this link as an example.
http://cgi.ebay.com/YAMAHA-PSR-280-KEYBOARD-ADAPTOR-STAND_W0QQitemZ220073317861QQihZ012QQcategoryZ38091QQrdZ1QQcmdZViewItem?hash=item220073317861I really like it for the $$. Velocity sensitive keys, great grand piano sound as well as many other interesting sounds. Also I use it as a MIDI controller in SONAR and it can trigger any of these sounds.
It's not built like a tank so I'd assume that taking it on the road would result in damage unless you had a road case.
As I said, for the $$ I don't think you could go wrong.