Hi Ofir,

I think, the 51 was easier to program.
The PIC use paging for SRAM and code access
and every 256 address locations can not be called.
So code is not reallocatable and relative jumps
to another page not supported.
This can cause many trouble on jumps, calls
and memory access.

In opposition on the 51 you can call and jump
to every location inside the 64k address range
and also access all data inside the 128Byte internal or
64kB external RAM.
Also relative jumps fully independend from the current
address.

Also you can try Atmels new AVR series
(see http://www.atmel.com).
Its also full linear addressed (data, program) without paging.

Also Atmels AVR (AT90Sxxxx) and 51 (AT89Sxxxx) devices
can easy be downloaded from a PC over the printer port
without any additional hardware.



Regards,
Peter