The iPod Touch 4G blows the doors off any PalmOS PDA I had, and frankly, I haven't looked back.
I've been looking for PIMs as good as I had a decade+ ago on my III, on both android and iOS, and haven't found any. Let alone the desktop software integration. I stuck with a Treo because of that up until very recently... That's one place I think we've really lost sight on these days.
When are we just going to get it over with and create 'unlimited' class competitions for athletics? Augmented or replaced limbs, oxygen doping, performance enhancing drugs, go nuts. Professionals do as much as they can get away with while they can get away with it anyway, let's regulate and expand it.
I think the DSi XL is the best of the lot, there are flash cards available for them. Nitrotracker is probably what I would go with if you're going homebrew, but I'm too tied to my hardware sequencer (read:old+lazy) to do tracking these days.
DS-10+ is the enhanced version of the original DS-10, refer to the other post. It's really a great little package.
Audio quality is surprisingly good, people are pretty spoiled these days. If you want to get crazy I've heard there are guys that modify their hardware to tap the audio before headphone opamp, but I think that's kind of silly. I can guarantee you that the outs on the MS-10 were a hell of a lot noisier then, and certainly are after thirty years.
A DSi XL, a Monotribe (or two!) and a Roland Mobile Cube would make for one hell of a portable synth rig. The monotribes do pulse sync, so you can run DS-10 as master clock. Run the audio channel through the 'tribe's filter and hold on to your butts.
I'm a long time nintendo fan and the fact that DSiware was almost universally horrible and the shop itself completely half-baked was a disgrace.
Here comes the 3DS with the virtual console games all the DSi adopters were expecting and ~surprise~ they're all 3DS only. What good was the extra power of the DSi? Korg DS-10+ is the only title I can think of off hand that actually used it for something other than crappy camera stuff. Sorry, ninty, I'm done.
"No matter where you go, there you are..." -- Buckaroo Banzai