i've owned all 3 boards...just traded the roland fantom for a korg TR61. Here's why...
At the church...we have a motif es rack we use for the primary keyboard player. Yamaha no doubt has better piano sounds than the korg. I also bought an extreme to use at the church to patch in strings when the secondary is playing organ.
The secondary keyboardist had the fantomx6...the only good sounds in our opinion were the pianos and some of the brass. The organ's sucked and the strings were okay. So instead...after much research and testing, we went with the Korg TR which has many of the brass, organ, bass, and string sounds from all the tritons...plus some other cool sounds.
As far as the korg triton classic...you will always see them at any concert. For one big reason...the touch screen and sequencer! It is is user friendly especially when doing sequences. The motif's sequencer is not as user friendly and the fantom is okay...but the touch screen is a big factor...plus the sequencer is pretty locked. Also the triton's only downfall is the piano...but that's why you always see a motif on stage along with the triton.

I have a korg triton classic, kurzweil pc 88 and motif es8 (just upgraded) in the studio. Didnt get the MO because of the 64 polyphony, it not having all the sounds as the ES, no sampling, etc. Go to motifator.com to see the comparision charts of the sounds in the MO and ES.
I love my triton and will never part from it...it will go down in history. Yamaha has the best piano's hands down (acoustic and electric). But for production...korg triton is it and you can always midi the sounds from the motif into the triton as an external sound source.
Bottom line...it all comes down to what your needs are...we felt it was no use to duplicate having good pianos with keeping the fantom and lack in the other areas...so we went for the Korg.
Hope this help!