Possible Replacements

I found some possible replacements my Sony Clie NX60:
Either the PalmOne Tungsten T2,T3 or C or the Zire 72.
All of these are smaller and lighter than the Sony Clie NX60.
The Zire 72 has only 24MB of RAM, which puts it at the bottom of the list, whereas the Tungsten T2 has 29.5MB, the Tungsten C 51Mb and the Tungsten T3 52MB. Here I'm referring to actual free RAM, which is sometimes significantly smaller than the RAM advertised for the handheld. My Sony NX60 was a prime example of this. On the box it says 16MB RAM, but actually only 11MB of RAM is available for programs. In reviews like the Brighthand.com review of the Tungsten T2, the reviewer says "The Tungsten T2 comes with ...32MB of SDRAM, 29.7MB of which are available".
The actual available memory versus specified memory is mucho important!