Lowprofile - I have a 2004 285 with 150 Johnson Carb and running a 24 Raker and 6" jackplate. Essentially the same as you excluding prop pitch. I found 3 3/8" below pad to be the best for me, 5500 RPM and 61-62 MPH (fall/winter/spring)depending on load and conditions. 5350-5400 RPM in summer, 60 MPH max.
I marked my jackplate with a center punch in 1/8" increments once I set the baseline at 3.5", so adjustments are pretty simple and I can go back to a setting without too much head scratching and bewilderment.
Hope you love that boat, I should have made my move to Stratos sooner than I did. The 285 Pro XL is a great rice.