felt_tips saidBest is a relative term. It depends if you mean best for desktop playback or the objective best color and detail reproduction there is… Best can mean optimal too.
But if you want best quality as in best color reproduction and highest fidelity to the original, then render to a tiff sequence using 16bit or 32 bit mode. This will produce files that are not only lossless, but that have a color depth of 16 bit. (unlike a Quicktime movie with a bit depth of 8 max). This is not usually necessary, but if you are dealing with very smooth digitally generated gradients, then it can make the difference between banding and no banding.
Note that on most screens it’s hard to even perceive the advantages offered by 16bit as most screens work at a bit depth of 8 bit.
I haven’t actually checked the following too thoroughly, but if you render to a dpx sequence using 32 bit, you quite possibly get an image with a color depth of 32 bit.
Apart from that, Shyamalborsaika, it sounds like you could do with some beginner tutorials. Have you checked out ae.tutsplus.com and videocopilot.net?
Ofcourse, I agree 100%. I was thinking from my situation, when I render tiff sequence for example and want mov output, I render quicktime movie (animation), I (as far as my eye can see) get the same result as tiff.