I currently have everything in binders though I have considered the previous mentioned option of using a 4 position sheet for graded cards at the beginning of the set for "key" high value cards. I generally begin to be cautious with cards >$500 in sheets.

All of my sets currently contain many cards that "were graded" which I removed from slabs. I bought them graded for the same reasons you mentioned in that it is more certain way to be comfortable with the authenticity and lack of alteration.

I dont think you can go wrong with any of the mentioned options. However, I really enjoy looking through the pages in anticipation of getting to the high end stars.