As much tweaking and adjusting as I do, I can't imagine the possibility of changing my arranger on a yearly (or more often!) basis..... My G1000 went eight years with me, and was one very honed piece of kit by the end. Unless they bring out a successor with a Chord Sequencer, I imagine my G70 will last me nearly as long.

I only lost about $1000 in value between what I payed and what I sold my G1000 for (a good case and covers goes a LONG way!), so that works out to about $125 a year rental..... not too shabby!

The time saved not having to re-work all the styles and SMFs is worth WAY, WAY more than that!
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An arranger is just a tool. What matters is what you build with it..!