Digital vibrance has 4 settings, 0-3. "DigitalVibrance" "0" is redundant, since 0 is off, and off is the default.
Try setting it to 2 though - looks pretty spiffy.
Try commenting out your cusorshadowalpha and x/y offsets. Let it do the defaults, see if that fits your liking. Check the nvidia README at:
That will tell you what the defaults are, and you can tweak things to your liking from there. Right now your settings have the cursor offset 3 times as much as normal, and about 10% darker.
If you have a dark desktop, you may need to up the alpha to notice a difference - against a black background, I can't see the cursor shadow at all.
Also, SWCursor "0" is redundant - off is the default. Best not to mention it.