I've mucked around with Neu Notes for a while. It is an amazing app but doesn't import PDFs.
I've just discovered its sister, Neu Annotate.
It can not only cut, but COPY the stuff you write/draw! No other app that I've seen can do that.
I have hated all wrist protection systems that I've seen on the iPad (to the point where I've been using a bridge to rest my hand on when not in zoom mode). NOT ANY MORE. Neu Annotate has got the best wrist protection of all apps I've seen. Very intelligently designed and easy to use (for right-handers anyway).
Also, its VGA-out capabilities are also (sorry to repeat myself) the best I've seen.
Also has shapes, add jpgs, tags, stamps.
No audio recording. No type-written notes.
I highly recommend this app. It also happens to be free.