16X DVD-r or +R in LVW-5115GHC

I see Memorex/Verbatim 100 spindles for $32 at Future shop.
Has any one verified if 16X -r / +r will work sucessfully
in the LVW-5115GHC. Not sure what fw i have, but just bought
it in June at Costco. How do you tell what the firmware
is…is it the number after the serial number in setup ??

Vancouver. $159 cdn… syd