Hi
I just cannot understand why so many are taken in by the Korg PAX5
Everything looks over crowded to me.
There is too many unanswered questions for me also and people talking about Mp3's is a definte no for me as wave files are easily the best.
From what i am reading is that the Genos is still far superior.
I say wait for a new Genos or will a new arranger from Yamaha which incorporates the Montage and Genos appear. Synth and workstation 
The Montagene create samples,intelligent stylemaker,seamless switching, fills on demand,monster hard drive with a must have coffee dispenser
That would perc us all up 
well, i have the genos and the pa5x next to eachother and the Genos is a fantastic instrument when you just want to play your songs.
I have also a Korg keyboard because i wanted to do a lot more on the keyboard itself and the Korg Pax series is the only keyboard that can deliver to me from what i expect from a keyboard. And the Pa5x is a huge step forwards from the pa4x. I've also seen the videos on youtube and most of them don't show what it really can do in my opinion.
For instance:
- the new touch screen is very responsive
- there are new styles and sounds
- they have taken sounds from the Korg Kronos, Nautilus and SV2 (the Austrian Grand is absolutely fantastic and the Electric pianos are the best i ever heared in a keyboard)
- there is a fantastic synthesizer on board where you can program your own sounds, it support subtractive synthesis, wave sequencing and custom samples up till 8 gigabyte)
- there is unlimited space for songs and styles
- you have 64 pads for your own samples or patterns like for instance acappella's, audio loops, addon sounds, drum kits, etc (4 banks of 16).
- you can also use 16 pads for muting every channel whenever you like during play, there are short cuts for soloing channels in your style or midi file, you can mute multiple channels or unsolo them with one button press. This is a very powerful feature when performing live because you have a lot of influence on your style that way
- you can assign lot's of realtime edit controls (including sound editting features) to every channel on the faders and knobs on the left side, you can switch between several modes which gives you up till 5*18 realtime controls -> 90 controls during your performance
- you can use two players in sync at the same time, this allows you to seamlessly mashups between your songs or create 16 channel styles by mix and matching 2 styles together
- the effect section is enhanced, you have a lot of effect slots available now for your two styles at the same time
- a lot of the High end Korg kronos effects are also in the keyboard, you can modify them now with a Graphical interface or go really in depth in the parameter section to program them completely at your will
- you can switch to manual bass if you like with one button press
- you can kill the vocal in a backing track
- the chord sequencer can be programmed in realtime during the play session
- and i can go on for hours, it's absolutely amazing once you dive into the possibilities
Most of these things can't be found in the online videos. I have no idea why people don't use them in their videos, this is where korg really shines.
And it's really easy now to create your own songs on it, for instance this morning i wanted to program the song: above and beyond - Don't leave
That didn't took long, what i did:
- first i programmed a new piano in the new sound edit mode in the synthesizer (so programming the oscillators, ADSR, filters, etc). It has that dark flavor of the original piano in the song now
- then i programmed a large reverb model in the Overb
- next was creating the choir in the synthesizer and add that to the piano in a new keyboard set.
- then i copied one of the Free Styles and replaced and modified some of the elements in the assembly mode of the style editor
That was all i had to do and it could all be done on the pa5x itself.
So that's mainly the reason why i really like the korg pax series. I do like the Genos also, but i wouldn't call it superior over the korg pax series. My opinion is the opposite to be true.