I've done my service/maintenance work myself - saving anything major for the dealer (when I trailer in the 4600 myself for them to work on). I don't remember the exact amount with the hydraulic filter included, but I just picked up all the fluids, oil/air filters, etc., for my 200 hour service and paid about $125 for it all.
I'd suggest doing it yourself - it's pretty straightforward and the manuals tell you everything that you need to do. I did find, however, that it was wise for me to doublecheck with the on-line manual (they arn't available for the 4600 now.. /forums/images/graemlins/mad.gif I'd still like JD to put them back on-line) as there are updated pictures, etc., in the on-line version that help.
Good luck and I'm sure things will go fine. Even my dealer has told me it's cheaper to do the work myself if I can. /forums/images/graemlins/wink.gif
-Bob