Giving Up Naps

Atticus is at a bit of a cross-roads.  He still sort of needs a nap.  If he doesn't nap - he turns into a bit of a monster by dinner time.  BUT, if he does nap - he has an impossible time falling asleep at night.  Case in point, tonight... it was 11 pm before he fell asleep.  He's going to have bags under his eyes tomorrow, and it may actually be a good thing there's no school!  So - if he wakes up completely tired, do I let him nap tomorrow? Or keep up the cranky kid and hope he goes to bed at 8 or 8:30 in spite of the expected storm.  Hmmmm....