I have Drawboard on my Windows Tablet. I absolutely *love* it. It's easily the best software that makes use of a stylus I have on my devices. 

I am looking for something equally as powerful for Android. Something with quick select tools for highlighting (including ability to quickly change colours) and something I can write notes on etc.. I want it to have a quick and simple interface. 

Any recommendations. I don't care if it's paid.