Well I'd say Sony,because they only made 3 playstations,and 2 types of PSP overtime.As for nintendo there just pulling money out of your pocket:
Nintendo DS
Nintendo DS lite
Nintendo DSi
Nintendo Dsi XL
Nintendo 3DS the newest edition being released in 2011
And microsoft is just plain cheap!Cmon, xbox360's only last about a year, then the chip in it "melts" and you have to get the chip replaced.
Anyways what do you think?