Looking for Palm with built in keyboard (preferably not a phone)

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I am considering downgrading from my Palm TX to a Palm with a
So far I have identified the Treo 90, and the Tungsten C.
I have considered the Tungsten W, because they seem reasonably cheap,
but it is a phone, something I don't need.
I saw a unique looking Palm with a keyboard somewhere, looked
remarkably like a blackberry, I don't recall the name, but it was
monochrome, and I need color because of my bad eyesight.

 In particular, are there any unique problems I should know about,
such as with the Treo 90 and the Tungsten C? Those are my top choices
at the moment.  Yes, I know about the older OS on the Treo 90, it
might still be acceptable (I have an old Handspring Visor, if it had a
built in keyboard and color it might sufice).

I don't want to have to use memory sticks, therefore Sony is out.  CF
flash and SD flash are acceptable.

Any recomendations?

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