Yea, I really like Oakmont and Bethpage because they challenge the heck out of me. It's funny how much different Oakmont is on normal/fast greens from my amateur/hack days and Oakmont on Very Fast greens. It really challenges you.
Another reason I love the Ready Go's for your individual level. I have been consistently profitable despite routinely being in the -2 to +1 range on those courses.
By the way, when I tried the follow up putt on Oakmont (from above), the green had yellow lines. When the slope is rated in feet, you know it's going to be rough. :D