Best Quantize and Velocity settings?

There are no best settings for these things.

The best setting is the one that sounds best for that song and that song only. Its also a matter of personel preference, taste and the type of style & sound you are going for.

CJ

I've been composing lots of  piano songs using piano roll view and staff view with mouse clicking working instead of real time keyboard recording.
So I think my manual sequencing methods may be helpful.

After working with staff view finished(synced to grid, same velocity), go to piano roll view, then turn off snap resolution(f12).
If there are chords, put each notes to different position very slightly by using mouse clicking and dragging left side of notes. Then it  sounds more smooth and realistic. 
And set each velocities of every notes differently listening the track by using mouse dragging at the "controller window" at the bottom of the piano roll view. 
It is more convinient if right hand part and left hand part is saperated (2 tracks) so that you can solo right hand when you tuning right hand part and vice versa.

Usually it is common that right hand part's average velocities are 70~95 in my case. Strong velocities above 100 is reduced for smooth sound. Average velocities of left hand are 40~60 so that right hand melody is always listened clearly.

But yes, it takes very much times :) and yes it is boring and hand-stiffing working.
But when the tuning finished, well-tuned song remains forever. 

If you need to use auto midi sequencing function, it is good to set the velocity range of each hand part I mentioned above. It sound well with any piano VSTi in avereage.

In your case, it is not important to quentize as every notes made in staff view are already quentized perfectly. But if you need it in any case, I recommand to set quentize strength to 50~60 for natural feeling.

JunL

I use staff view to write my midi tracks. During editing i insert the notes picking the durations (whole, 1/4, 1/8 etc) but to not waste time i don't change the velocity wich is set to the sonars default 100. As result i get a tune with perfect time synchronization, and full dynamics in every single note, but that's so bad when I'm trying to make let's say a smooth piano part, so i tried Cakewalks Velocity and Quantize midi plugins but i can't get something good so far and I'm here to ask which are the best settings you use to get this (as far as possible) human feeling from a track.

Even if your keyboard playing is less than stellar, I'd recommend trying to play the piano parts (as opposed to entering each note via the mouse).  With a little practice, you'll achieve much more natural sounding results... with far less time/tedium.

++1 to Jim and Jonesey.
I, also, absolutely recommend playing instead of using staff view if you want some kind of natural touch in a reasonable time. As mentioned above, if you're playing skills are lacking (like mine) you don't need to be able to play more than a couple of measures, or even a few chords in one go, or you can even play first the right hand and then the left hand, and then do some manual editing. Still, you'll proceed much faster and get by far more natural result than going through the whole piece note by note changing velocities.

Randomized velocities can be quite unnatural, as the software does not know the feel of the tune or the dynamics you're after.