I'm running a JDX300 with a 17hp JD iTorque engine and I'm not real happy with the cut quality. I don't do alot of mowing so it would have been hard to justify much more of an investment. I am currently using JD mulching blades (they came with the mulching kit that didn't really do what I was hoping). It seems as though I get quite a bit of grass that doesn't get cut at the same height as the rest - it got somewhat worse when I used the mulch kit but I have come to understand that to be typical. Could someone explain the different types of blades that I have available to me and what I might do to get a better cut (short of a new machine). Also, before anyone says it, the blades are sharp.