Odd, ive heard from a lot of people that sell monster that its just over priced junk. They buy it because at cost its $5, but said if they left the job they where at, they would never buy monster and go with the better cables at monoprice.
Again odd... I have heard more bad things about monster than mono, but the price is cheap and maybe that's the reason.
So without me having any monster cable, or monoprice cable I cant comment on whats better. Ive just always been told monster cable is ok, but it for people who buy something solely based on name alone and not quality. Bose comes to mind as well for the same thing. Hope ya get it sorted out.