Quick reply...
N900 is not evil. [Joke] If it has resorted to possessing you, then it's possible that it is saving its brethren from a painful fate somewhere else by having them bought by you. [/Joke]
Do not feel guilty. At the very least, if the time comes for you to use only one of the devices, you will be able to make other people happy by giving to them your redundant devices.
Best wishes.