For online quality from DVCam I would suggest something around 240k PAL. DVCam data rates are lower than that, but since the signal gets converted to uncompressed and then recompressed to the Media 100 i codec it makes sense to keep the data rate higher. On recompression artifacts could appear when using lower data rates.
[macmauro] “PS which sotware i can use to convert 4:3 to 16:9”
E.g. AfterEffects. Or Media 100 sw, which is quite good at mixing 4:3 and 16:9 material.