medmon.. the speed i'm getting.. if i got my math right.. would take my current render 83 1/2 hours... i'm extremely experienced with and pretty damned good with photoshop.. but there's NO WAY i could get rid of all the noise in this thing w/o seriously ruining the overall quality of the shot.. not even with the most accurate despeckle and hot noise filters currently made.

edit : would take that long to hit 4000 passes.. it's a 1920x1920 shot with a full-width mirror.  only pulling between 47k and 50k s/s..