bl revo motor question's?

yup im getting a quark 125, but what kind of speeds am i going to see because im reading the thread about them and everyone is saying there slow..... my gearing will most likely be with a 84 or 97 tooth spur and i dont know on the pinion........ is there any other slipper sytems out right now because the strobe slipper is gone so i dont know what to do there? one more question hoe do i wire my speedcontroll with deans for two batteries, pics would be nive.