Well having had the Korg for a couple months, I have to say the reason I bought an Arranger instead of a Workstation is STYLES....So I sold it. The greatest operating system computer in the world without software is very limited in its usefulness. AN arranger without a ton of styles is the same. I would have rather seen Korg develop 2000 more styles than an upgrade.
there just isn't the library out there there is for the Yamaha. I could have just bought an M3 for the Sounds and arpeggios and bought midi sequences..
I liked the sounds generally but the Yamaha has better acoustic sounds. The drums are nice on the Korg though. The learning curve is higher with the Korg to take complete advantage of what it can do.
Since we are dealer for Yamaha and now Korg I can get any keyboard now for 10% under cost. I have already ordered the Tyros 3 and will probably pick up a PA800 as well and try to get the Yamaha style sequences to play on both.
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Yamaha Tyros 4
Yamaha Motif XS8
Roland RD700
Casio PX-330
Martin DC Aura
Breedlove ATlas Solo
Bose MOD II PA