Yamaha DTXpress/DTXplorer/DTXtreme

Hi,

I am considering either a DTXpress III or the special edition. I would
be grateful for the combined knowledge of your knowledge on these
questions:

 - Is the only difference with the IIIS that you get the three round
cymbals, a throne, pedal and better rack? Is the actual brain the same?

 - Can you buy the round cymbals for the normal III?

 - With the normal III, do the cymbals have a bell? I really use the
bell of a cymbal a lot in my playing and really need it.

 - Anyone know the suggested price for the III and IIIS in the UK.

 - anyone know a place to get these kits cheap in the UK?

Thanks for your time. :)

  Jono