OK.  I think I've decided to get one.  Figure if I don't like it or can't tolerate it, one of my 20-something sons can use it.  The only question is what model.  I'm leaning towards the NX-250 or TX-250.  I know Jimbo has one--was hoping for some feedback on your model, Jim.  If anyone else has any personal use of Clark or any other brand, would appreciate your thoughts as well.  Thx.