Danster, all we saw were just 4 pictures and we don't know if they are true or not.
With photoshop those pictures can be made in an hour.
That is why Eilleen find it kind of strange to ask questions about something that no one saw.
But to answer your questions of what I think,is that the new psr probably won't have any human voices as your Tyros.
I think the expansion packs you have bough with your account in Yamaha music soft, when you upgrade they give you the packs you have previously purchased for yourT4 for free,if I am not mistaken if they are compatible with your new model.
Of course packs that are compatible just with just Tyros and Genos won't work on a Psr.(e.g. human voices)
As for SD you mean the extra disc the Tyros 4 has for the packs?
Psr models don't need such disk for the packs.They just use the internal memory which is limited.
Babbete, the psr is a keyboard for playing styles.It is already cost to much the development of the styles and the sounds.
I know that cheaper keyboards give some extra of the stuff you mention but their sound is.....well.....how can I say it politely....back to the 90's.
Some they like their sound I don't have a doubt about it.
Some they also like a new song that is identical to thousands of other songs.
I have no doubt about it also
I don't know if by putting little of this and little of that on an arranger you will end up with something really expensive with few buyers.
I cannot understand what kind of setup will be,on board speakers with a.... woofer???
Will the woofer facing the keyboardist too as the speakers?
I saw 8 registrations in the photos.
10 registrations will cost more I guess.
Take a look at youtube and tell me how many regs people are usually using?
When you see someone to use 8 regs please tell me to subscribe to his channel