What kind of quad will this be? Just a basic trainer? Will you land it flat or plan to have some sort of landing gear/skid? Will you need wire/connectors to route power from the distribution board to the ESCs to the motors? No FPV? Do you have motor mounts? How are you going to mount the F.C. to the aircraft? Zip ties for securing ESC's wiring, etc.
One thing you might want to consider besides a monetary budget - think about a weight/power budget. How much will your aircraft weigh? That might help you determine what size motors to get, which in turn will help you select ESC's and props. You're gonna want your motors/props to put out 2x thrust as the weight of your aircraft, preferably at 50% throttle - the total current draw will help you determine flight endurance for the intended battery capacity (mAh) - there are online calculators to help.
