Joel,
I might be mistaken since it has been 14 years since I did my CPL but it was two months classroom work to pass the exams followed by 5-6 hours of mock and real GFT as for improving your skill you would spend you money better by doing a mountain flying course followed by an undersling course followed by a fire fighting course and first and fore most since you own a Jetranger a factory course. You seem to have the money and this is what I would do if I had the wonga.
But maybe you can ask Dennis Kenyon to impart his wisdom to you for a couple of hours or other well respected commercial pilots.
I know though what you mean and I believe we do lack a general training support which one would like to do outside the OPC. Gary is doing a good thing with his Flight Safety aspect but I would also like a general handling aspect for which there is not always time ore money during or after the OPC.
I hope I am making sense.