Here is the latest I've just come across as far as Yamaha's description of the new T5:

http://www.poubnews.com/yamaha-tyros-5-larrangeur-haut-de-gamme

The English descriptive info is below the French stuff so you don't have to parlez Francais. There's quite some good stuff on the new model but I'm not as excited as I hoped to be. On the other hand, 76 keys is very important to me so I'll definitely take a closer look. I hope the keys are a better quality than in the past.

Hal
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Korg Kronos 88 and Genos, Logic Pro, Omnisphere