High performance random-access disk operations (Raidframe?)

[Chris Ross <cross+netbsd%distal.com@localhost>]

  So, I'm building a machine that I want to have a filesystem that  
performs very well for [mostly reads] random access to random parts of  
data files.  I don't expect as many directory operations as file read/ 
write operations.
  I was thinking about Raidframe RAID 0, but wondering if the extra  
level of having the raidframe code in the mix will slow it down?   
Would I just be better using a single partition/device of smaller size  
than to go to the effort of using raidframe to stripe things?
  Thanks.  Apologies if I didn't give enough information to  
adequately explain what I'm asking about.
                   - Chris