[CentOS] OT: RH 4/5 and 3Ware 9500 firmware upgrades

I've just noticed that 3Ware has a more current version of the firmware 
for the 9500S than I have on several machines.  All of mine are running:

3w-9xxx: scsi0: Firmware FE9X 3.04.00.005, BIOS BE9X 3.04.00.002, Ports: 8.

and the latest rev appears to be 3.08.  I'm wondering if there is any 
compelling reason to upgrade or just let these sleeping dogs lie.  :)  
Any sage (or other) advice would be much appreciated.

Best,