the m100 will do pocket george its just monchrome colour
the m130 is george in colour same thing just colour
the tungsten will do a lot more apart from george has a basic sat nav and sd slot so you can do music through it
the xda 2i will do window cleaning pro only as it has microsft operating system on it.
all depends on what you want them100 or m130 will do george cheaply and with less fuss.
will not work on vista or 64 bit