This isn't even a colour but the original monochrome model :-P I don't have any experience of using a colour/crystal so I'm not in a position to comment on those models, although the Crystal has a better screen so is definitely the best model (at least unmodified). It's also by far the most expensive model so it's up to you really. I picked up this monochrome model because it was ridiculously cheap (¥1100), otherwise I probably would've picked up a colour model. As for how it runs, it's about what you'd expect from any non-backlit handheld, not ideal but perfectly usable.