i disagree with the short nap, your body best replenishes it self when in deeper states of sleep such as rem or sws (short wave sleep). You could meditate if you like that would be justas beneficial as a short nap.
IMHO.
If you are training hard Even if you can function on 6.5 hours of sleep per night, i'd suggest getting as much as possible. I try and get 9 hours of sleep a night, I havent got that yet but Thats what i'm working towards.
Lift big, Eat big, Sleep big.