What type bow should i buy?

I have been looking around and i decided to buy a bow off ebay now and the thing that is troubles me is that i notice some of the good name brands like HOYT and Matthews also Darton PSE martin but there is some other bows like a golden eagle and a bow i have been really looking into a Force II magnum but i cant really find how good quality they are compared to some of the now name brands and i was wondering if anyone could help me with this and also