Palo,
i had an E60 for a couple of months but had to return it
for a defect. in the interim i considered the ketrons,
korg pa800, but was waiting for the s900 to make a final
decision. I tried one at Sam Ash on tuesday. also the s700.

I decided to reorder the E60 because they fixed the bugs
and made the v-link a control button..but I had to really sleep on this decision. I found the E60 had shortcomings for me, but its good points held my interest. I finally made my decision based on this: the old Korg I have been using I still love, but I wanted not only an updated unit but 76 keys..that's why i wanted the E60 originally. the new os
updates tipped the scale for me re the drawbacks of the
E60..it still has many for me, but I shall overcome!

These 2 units are great, the same price, but so different you really have to try both before you decide, and you have to prioritize your preferences in advance, too. How important is 76 keys? a little or a lot?
how important is the better key feel on the E60? the s900
has a pretty decent key feel..just not quite up to the E60.

How important is a mic input and harmonizer? the s900
has it, the E60 none..btw the s700 also has none and no
SA voices..are those 2 features worth the extra $600 to
you? if not, consider that the s700 is also $600 less than
the E60. the Yams and Rolands have different types of
layouts and navigation..you'll need to decide which has
the ones you would like better. I'd have to give the s900
the edge on this..very decidedly..but the s900 has no
dedicated slider or knob for accomp balance..you have to
hit a button, then into screen..I didnt like that, nor the
design and layout of the tap tempo..but most everything
else on the s900/700 makes more sense than the E60.

for the same $, I would have not lost any sleep and picked the E60..but for $600 less, I was seriously considering the
s700 and was a hair from going that way..because except
for a couple of the guitar sounds, i didn't care about having the SA voices, and didn't need a harmonizer. The
E60 also has 2 special feaures: strum guitar mode and split organ mode. Most think they are very cool..I never use them.

I won't comment on the styles and sounds except that
to me the suitcase Rhodes sound on the Yams is just
a killer, nothing close on the E60..and the scat voices
on the Rolands are a killer, give me a huge kick, and nothing of the sort on the Yam. you will have to try those
or at at least listen to samples online to see if there are
reasons the styles/sounds on one or the other would
influence your decision stongly, slightly, or not at all.

Hope this helps..in either case, they are nice boards...

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Miami Mo