To thow the balance a bit to the A600 I vote for the A600.
The PCMCIA slot can be used for compact flash and network interface (not at the same time). The 500+ lacks this.
An A600 boring? It is just as exciting as an A500. Unless you get a kick out of huge footprints, socketed chips, military spec
Again A600 is the one I should keep.
Unless you want to sell the A600 to me then I'll advise to keep the 500+.
