RAID Cache: 64MB vs. 128MB

I am going with a RAID 1 config with 2 36GB 10,000rpm SCSI drives. I have the following choices for primary controllers:

PERC3-DCL RAID Card w/64MB Cache 1 Int/1 Ext Channel
PERC3,DC,128MB,1-INT,1-EXT ($350 more)

My question is will the 128MB cache make a difference from my customers point of view? Is the extra cache worth $350? Has anyone experienced problems with the 64MB cache?

Thanx

 

 

 

 

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