pnd8000 settings

I used them on my 64d8000 and they look good, although I thought thought the picture looked a little "soft" with the sharpness setting at 0. I pushed it up to 25....maybe a psychological thing but I thought it looked better there. I'm looking forward to getting it professionally calibrated.

My question is this....if you use the picture settings that Katz recommends, how much better would the picture be with an ISF calibration? Would it be worth the money to have it done?