There are lots of threads on this issue. I agree somewhat with "If it ain't broken don't fix it", and if things go wrong, they usually show up online. Most often, they are to address discs that don't work due to new Java-coding on the disc. So if you're not running into that, you're probably good where you are.
From past experience with computer motherboards I really hesitate to upgrade firmware. My usual feeling is "if it aint broke, don't fix it."
My network connections work great so I was seeing if I could update the firmware but before i do are there any past experiences on the firmware updates for your Samsung products? Good, Bad, whatever?