As an XDA owner id say get it !!!!
Notable Software : VNC, Pocket Putty, Skype, Office, Mortplayer, Media Player, Opera PPC and a shed load of other software which just make life easier
Try the Trion Tho (400MHz 64Mb Ram)... QWERTY Keyb is a large bonus LINK
Or The Orbit (201Mhz 64Mb Ram).. GPS LINK
Argon is 400/128
take a look @ the indepth specs this is usually a gd site http://www.pdadb.net/
and IMHO WM5 is the best PDA OS out there