I don't think we'll see the "pro modern arranger" anytime soon. The makers always keep a stiff line between the pro synth, and arranger. Yamaha finally is letting a little of the technology leak over into the synth line as the Motif XS has some "arranger like" functions. Hell just the other day Yamaha posted a reply on the Motif forum that some of the patterns on the Motif XS were taken DIRECTLY from the Tyros 2, along with many of the acoustic voices--however those sneaky boys in marketing and design "changed" the names of these instruments carried over to their top synth so they wouldn't have the assocation with their "arranger roots".

I don't think you'll see a modern pro arranger fro several reasons. One it's already a very shady issue on "price justification" for pro arrangers now when compared to pro synths. The price difference of the Motif XS and Tyros 2 is evidence enough for that. There has already been numerous complaints that the MM6 is at least $100 overpriced. So I can only imagine what the makers would charge for a "modern" pro arranger. Personally I don't think they can get away with the high price because obviously (as the numbers will probably show) the (younger crowd) which is where they'll sell the most wouldn't pay $3500-$4000 for a pro arranger when for example a Yamaha Motif XS can be bought for less.