BIOS upgrade ?

   My current version of my BIOS is A05 , this is the BIOS ver that my XPS400 2.8GHz Dual Core O/S WindowsXP Pro SP3 MCE 2005 came with !  In optionial upgrades under my support # it list ver A07 as a option to upgrading my BIOS ? I have never flashed a BIOS B/4 and I know that a big no no would be a power outage !/2 way thru flashing it ,otherwise I've been told its a easy upgrade that should go smoothly. I like the old "if it ain't  broke don't fix it" rule of thumb  ! Is anyone familar with this A07 version of the BIOS and if in my situation would you go forthe upgraded version or just leave it alone ? All replies appreciated !

                                                                                                                                                                                      HAPPY HOLIDAYS. Nick