As there is currently no open arrangers made, Diki�s comments are moot.

Wersi are not hugely expensive as they cost no more (And in many cases cost less) then other manufactures equivalent products, so don�t know why this was bought up. (Also all Wersi updates have always (And continue to be) free)

Consider This
Assume for a moment that the T4 was based on PC software/hardware, now as all the new features on the T5 are just software upgrades, they could have easily have been downloaded into a T4 (For a cost) to make it into a T5, but at a fraction of the cost it takes to trade in a T4 and buy a new T5. (That is the advantage of a computer based software arranger)
NOTE: The above also applies to all the big boys.

Happy (Lighter Wallet) playing

Bill