Hi Normski, some point: 1) volume/expression you are right, I solve this with Behringer FCB1010 (even considering that PX-5S born as Stage Piano...) 2) lack of Mono mode but again I don't see a product like the PX-5S the best buy for lead synth needs, both for weighted keybed and lack of aftertouch, that's why I use an Ultranova by Novation 3) Organ: as I mentioned several times I don't think that PX-5S is a viable organ solution, problems are (before sound and Leslie sim) related to the keybed. Even with a great sound and a marvelous Leslie sim if you don't perform them with a waterfall keyboard you miss a lot in terms of final result! As Joelfan stated above what moved us (PX-5S owners) to choose this product are all the good things that he mentioned very well...and don't forget the very competitive price!