I have a
Core i7 2k 3.4 ghz
16gram
Nvidia zotac gt 730 4gig

Raytraced time: 13 mins
D.Map time: 5 mins (but without feathered edges) just as you said the filter just generally reduces the shadow intensity instead of feathering the edge like the ray trace does.

And yea, I wanna make an animation.. .

Here is my recent render... I created another spotlight and placed the light cone half of the wall so that the brighter (lower) part would simulate light bounce from the floor and also part of the bulb illumination rays and the upper part of the wall darker to simulate lack of sufficient light.
What do you guys think?