That's not true.MIDI cables, long or short, produce absolutely NO latency at all. None.
I do understand reluctance to upgrade. I feel it myself too, often.
There's a lot of misinformation spread by PianoTeq users about sampled pianos (many PT users have no experience with sampled pianos and therefore do not know what they are missing), suggesting that sampled pianos have playability issues or are lifeless in some way
Try the Galaxy Vintage D. It's much better.
I play the yamaha n3 and would like to hear from people who have tried ivory11 on the n3 and is it a better sound? and how to conect it all up could I run a long midi lead from computer room to music room is that ok and will the TRS still work if playing ivory ii through the speakers of n3