Thanks for the replies guys, I didnt expect to recieve such a thorough response. I'm still digesting the information.
At this point I am seriously considering hydraulically running a 540rpm
PTO. If I have a flow of about 18gpm @1500-2500psi (I prefer the lower pressures) then I believe I should get the power I want based on what you guys have running your direct drive mower decks.
Thanks again