repotting large Brs. Edvah Loo 'Nishida'

[MrsSky]

Hi there,
First I would like to say "Thank you". The orchid board members have given me so much good advice. I re-read old posts when I have a problem and my orchids are so very grateful!
I'm hoping to get some advice for my mother's day orchid. It is a very large Brs. Edvah Loo 'Nishida'. I have a 15 inch bowl from HD hoping to simply drop it in as I have done before for other large oncidium/oncidium hybrids. It is too big for the 15 inch bowl (I would have to remove 2 or 3 clumps). Would this orchid be a good candidate for a large tree fern pot (I saw a 12 inch pot at Quarter Acre Orchid) where the orchid could grow onto the pot itself or should I look for a monster bowl? I would prefer to not rip it up-but it appears to be growing up in the middle also. I am including pics.
TIA, Mrs. Sky