Apparently I am facetious in my sleep posting.
http://forums.musicplayer.com/images/markup_panel/default/bigger.gifAs to why people would buy the old NEO, there was a thread recently about someone not buying into the lightweight class D amps. One of the reasons brought up had to do with them not thinking that they could get the tone they want out of something so light.
There are those that also believe the heavier a cabinet, the better the tone.
I have had a GK SBX 4x10 which I loved, a GK NEO 4x10 which wasn't very good sounding to me at all and I used the same head, and now the MB 210 combo, which is like a junior SBX that even with adding the extension cab will be 40 lbs lighter.
To me, the weight of something has nothing to do with anything as far as sound goes.