Do you want to record perfect sound, good sound or acceptable sound?
If you want perfect sound you need a seperate audio man
If you want good sound you should invest in a Zoom H4n or similar and Rode NTG-1/2
If you want acceptable sound go for the Rode Video Mic and Zoom H1
I wouldn't bother putting it straight into the camera unless extremely necessary because the DSLR auto gain is quite poor