Luis,
no arranger is perfect; the only way to attain perfection is to buy more than one, because each one has pros and cons.

(That's why I have an SD1, a VA7 and am planning to buy a 9000 pro...)

(Okay, better get going now...)
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Korg Kronos 61 and PA3X-Pro76, Roland G-70, BK7-m and Integra 7, Casio PX-5S, Fender Stratocaster with Fralin pickups, Fender Stratocaster with Kinman pickups, vintage Gibson SG standard.