Kch,
I maintain a few ball fields,and over the years of doing it I have found that a Harley rake (power landscape rake) does the best job,hands down.Nothing else even comes close,the power rake will level,turn,smooth,rake,and remove grass all at the same time,then during the season,just hit the fields once in a while with it and it'll shape it right up! The biggest downfall to it is the cost, a six foot Harley pro rake will run somewhere between 6-7 thousand dollars,I know it is a sticker shock but mine has paid for itself 1000 times.Having one of these rakes gives you lots of potential for lawn intstallation,driveway grading,lawn renavation,ans maintaining ballfields.Since I've had mine,I sold my york rake,and my box scraper just keeps gettin' rustier,once you have one you'll wonder why you didn't get one sooner!