[sungnee]

You did not say which film you plan to use.

It might surprise you to learn that film is more important than the lens in the rendition of the photograph. The best thing to do is to try different lens/film combinations and see which one you like.

Just as an illustration of one of the things I have discovered by trial and error in 26 years of Leica usage: the older Leitz lenses have lower colour saturation, which pair very favourably with Fuji films because Fuji films tend to have high colour saturation. With modern Leitz lenses it was disastrous because the colour saturation of modern Leica lenses is also extremely high. The resultant photographs had colour so super-saturated that details were lost.

We also don't know if it's sharpness that you're after. Actually if sharpness is your only concern you'll probably be better off with the other major German brand. I know that Leica in the last decade have become rather obsessed with sharpness but personally I think that's a mistake.

Traditionally Leica lenses seemed to have been optimised for Kodachrome (64, I think), although I have never seen confirmations from Leica to that effect.

There are many internet forums on film and you may want to visit some of them.

Post-processing digitally is a poor remedy.