<< Is it worth it to upgrade from the live value oem to the audigy gamer? >>
I`ve both ( SB Live in my old PC,Audigy in my new one) & I can tell the difference,so for me it was worth it,however it all depends on many factors like quality of your speakers & how good your hearing is,one person might say "not much difference" while another would say the opposite.
It`s real important you hear the sound card yourself since nobody here can answer that question for you,if you do a lot of gaming then it`s probably worth it being it has lower CPU usage and sound quality in games is better,but this is my opinion so I can`t answer for you 😉.