If Roland bring out an arranger with ARX expandability, I hope they have the sense to NOT drop the SRX expandability, too. Sadly, their WS line has not been that practical, and many users have complained. There are only the three cards, they cover very few bases, are very expensive, and the expanded sound ROM only has SOME of the great SRX sounds.

My take on the whole thing is that there is NO one 'best' anything. Only shades of gray. It would be SO much simpler if there were...