Can you help decide on the RAID level to use –

Can you help decide on the RAID level to use –
we are a media house and we use lot of graphics/video applications – we need large throughputs for videos to get played without any jitter and since we are in publishing business we can’t afford downtimes.
Even if there is any downtime we would like our data to be quickly reconstructed and enable us to continue with out work in less time.