I vote for heroic technique.
I am working on Bach Cello Suite 1 Prelude myself. If, like me, you are using this as a technique builder, work through those arpeggios. I think its actually pretty cool to go from 3rd or 4th position to something up in the thumb postion - especially when you can get your intonation down and make it musicial. I go up and down that arpeggio to practice getting in and out of thumb position cleanly.
For some reason, I am really attracted to things that take your ego and throw it out the window. Like when I feel tough because I can play the head for a Charlie Parker tune, but I can't intonate a D Major scale with a bow in thumb position...

Working through that hard stuff is what makes you better player in the long run.
PJ