I'm going to echo the last few replies and say let the cheeks grow natural. You've got what looks like pretty uniform cheek growth already. I also suggest you let your neckline grow natural as well. Sooner than you think, your beard will be long enough to cover any maintained neckline and if you let it grow now, by the time you reach your goal, it will add a lot of bulk to the bottom of your beard and only enhance its overall appearance. It might look untidy now but it'll be worth it in the long run!

Good luck and keep growing!