SQL Server data files and RAID

Question

I have a server with a RAID1 volume (OS + apps) and a RAID10 volume (database).

The RAID10 volume has 6 physical disks. Should I split the SQL Server database into 6 datafiles (one for each physical disk) or leave it as one single .mdf file?

Edit: to clarify, I am not concerned with the theory of having single or multiple data files, I want to know if the fact that having 6 physical disks in the RAID means that I should have exactly 6 data files, or does the fact that they in an array make this irrelevant?

Thanks