Not sure if this is relevant to a PA 28, but the easiest way to get up to 10,000 and above is using wave over hills. Did this over the Preceli hills in Wales last Dec. N Winds of 10-15 knts can give a good updraft on the ridges, took my ATL upwards rapidly, assisted of course by the little engine. However a word of warning, if you take off at +2 degrees it's going to be -18 at 10,000 ft and odd things can happen...like frozen ailerons in my case.
