The basics of infringing domains... usage, usage, usage... You make no mention how you would be using it, and I gave some helpful advice.
As far as other domain in concerned, what about it? Do you realize how long and complicated the domain/TM game is? But it has been covered to the Nth degree here. Just use the search box and type in "trademark" and "tm". Almost all senarios have been covered.
But the bottom line in "bad faith" or "good faith". There is no grey (though in reality, there is. But in the domain game, any hint of bad faith works against you).
PS- PSP doesn't really go after domains because it helps promote their products. Windows on the other hand, they protect it like a hawk, that is the difference.