Is there some reason you need disc brakes? For that price point you can get more bike with Vbrakes - lighter weight as well. Unless you know what you are doing stay away from Hydraulic brakes especially cheap ones. Nothing but trouble. I have changed out all my hydraulic brakes (good ones at that) for mechanical. I can maintain the mechanical... I have to take the hydaulics into a shop and they always have more problem than the simple mechanical brakes. Personally I see no difference in stopping power...