Playing so much manual bass makes aftertouch a negative for me. Since the entire keybed responds, the velocity changes I make with my left hand would affect the sound on my right. Thankfully, for my style of play - it's mostly chord changes in the right hand, and aftertouch is not something I need for expression.
Won't be long now, people - I'll be one the the first SX club members in the US. Bring on the 900.
Until it gets here - Season 9 of "The Walking Dead" is keeping me busy, and VERY entertained.