D, that sounds pretty solid, as it's about 1/3. It should provide enough slack to get you generating some good speed off the floor, and then leave you to lockout your max. Are you planning on greens? Seems like our blues take at least 4 plates (total) to drop...and even that you can sometimes "dribble." LOL
Also, something we do is bands or chains on the floor, off a box to work the very bottom for speed. Do you ever do that?