A very bright and happy morning to you Kevin, i would say there are not many people out there growing celery anymore, well the blanching type anyway.
A couple of good old varieties still have to be, Solid white and Giant pink.
I think if you could grow the celery well it would not matter what variety you grow for showing.
The biggest problem for celery has to be slugs, lack of moisture and slugs.
I can remember an old farmer growing trench celery years ago when i was a boy, that first celery of the year was something really special sitting round his big old kitchen table.
Kind Regards, Old Herbaceous.
There's no fool like an old fool.