It will depend on your body, and how well it does or does not respond to less than 8 hours of sleep. There are pros who get less than 8 hours, so it is all a matter how your body is. Also, drug use would play a part, eg. steroids would help recovery, so one might do as well with less sleep providing they have an increased recovery rate.

I would suggest to maintain your current schedule, and see if a couple hours less sleep has a negative effect. Using myself as an example, there are many times during school I only get 6-7 hours of sleep per night on a consistant basis... I always expect a negative effect in recovery and the gym (and tiredness, etc.) however I seem to function just as well.

As for naps... I like them. They really help me feel rested. I limit mine to 30-45 minutes personally, however I have read that, for some reason I can't recall, that one should not exceed 30 minutes, due to some sleep pattern/ REM thing. Anyone who could exaggerate on this would be appreciated.

Just make sure to listen to your body.