Which is better, in your opinion?
I don't know, but I should have a better idea on Monday when the HD3 arrives (at least scheduled to arrive). I like the 5.17(?).x release on my Touch Lux 3 (that won't hold a charge), so I'm guessing I might like 5.19.x a bit more (since I'm familiar with it). But PocketBook let's you go back and forth. So I'll test the 6.x first (if that's what it comes with).