I need help on choosing a PDA

I am a musician, so my needs are a bit strange.

I am looking for a pda to plug, and record my guitar into directly, I
want to be able to plug in, and hear my guitar without "having" to record what I'm doing, but I do want to record when I make something I like.

A software mixer would be nice as well, but not neccisary.
Basically I need this for note taking, and maybe a quick porteble studio.

As far as I have gathered there are no pocket pc's that will allow me
to do this.
All I would need is an input jack, doesn't really matter what size,
I'm sure radio shack would have an adapter.

Other features I'm interested in are as follows:

color LCD - with good res.
I'd like a processor over 500 mhz
voice memo record must have an external microphone jack, and internal mic. (ex. for guitar-int for voice)
Headphone Jack, and speaker
wireless connectivity-wifi - network capability
it would be nice to have a built-in keyboard
usb (for an external hub)
expandable memory
I would also like to be able to install my own programs like desktop guitarist


programs:
Probebly windows something, or othor ...
note pad
media player - MP3 player
alarm clock
automatic reminders of appointments
calc
games

I don't care about writing recognition,camera's,cellphones,Outlook,Excel,Word , or PowerPoint.

If this is something you think is already
available, or can be built for me any info, or help would be great.
I'm not thinking about money right now, becouse I know I will have to save up for this.

Thanks in advance: Jave

Edit:

I think I've found a solution to my guitar issue.
Aperently I can buy a small usb audio mixer for around a hundred U.S. dollars that has built in effects, and distortion. (not sure if they're usb powered, or not.)
I guess this isn't a huge help to anyone else here, but for me, and possebly other musicians this is a major bonus.
now all I have to do is find a pda I want, and make sure it has enough mem space for the drivers, and usb.