I see. Then get the M3 . Seriously, if you hadn't check out the M3, go try it. I was there last week and after the demo and hands-on, I am impressed. Funny the keys felt so much more comfortable compared to the last time I was there. In a way, it felt like the XS'. Bottomline - must try and like what you buy.
Good morning, I already have the M3-73 and I don't like it at all. It sounds like plastic. It doesn't have a single natural sounding piano. Some pop sounds are ok but the natural sounding instruments seriously sound horrible. Same with brass... brr... I'm selling it.
Not that bad, is it? Anyway, if I were you, I wouldn't sell it and would just get a module to pair it with. After all, the M3's interface would serve as a very good master controller. Don't waste money (especially if it's hard earned), ok? ... there are people in this world (like me) who are enving you for what you have.
FlorianLux, didn't you try out the unit before the purchase? Anyway, if you are looking for realistic acoustic instruments, Korg is the last thing you would want to consider. Entirely different genre. You should be checking out Roland.