I don't have a T5 but I still have my T4.

The only thing the T4 has over the SX900 is possibly the keybed & selected SA2 voices but other than that the SX900 is superior in every other way.

The SX900 is the best value for money keyboard out there in my opinion, strip the Genos of some of it's features that most people possibly wouldn't use anyway and you are left with almost the exact sounding instrument with a few exceptions that the Genos exclusively has.

I am with Rikki and I know i definitely made the right choice. If anything, if I bought a Genos at such a high cost only to find Yamaha releasing the SX900 which sounds close for so much less I would have been annoyed, instead I am ecstatic !