I had the same questions in 2011 (oh crap, has it been that long?):
Oil Starvation
I learned, as you mention, that there are widely varying opinions on the subject which leaves many in the position of not knowing who to believe or what to do.
I came to the conclusion that the X-51 baffle and changing the oil pressure spring & piston was all that was needed (stock oil pan) for track days in a street car on street tires. Eventually, I added a deep sump, 997 oil returns, and the horizontal baffle after upgrading to the Spec Boxster suspension, R- compound tires, and having improved my driving to where I was quite a bit faster (and pulling more g's).