I've been using iA Writer which does most of what Notes+ does. I'll check it out. One of the advantages of apps that cost $1 or $5 is that it's possible to try one or two our, or switch when something better comes along.
I also recommend Instapaper. It installs a new button on your browser. Press once and whatever text on the page you're reading is added to the application. Stored and ready for reading at a later time.
I know that an iPad is not cheap but...
When I'm meeting with a client or in a conference call researching a paper or an article, I spend a huge amount of time taking notes.
Several years ago I saw a device that was like an A4 notepad in size. Actually it was an A4 notepad upon which you wrote notes and sketched diagrams using a special pen. Under the paper pad was a thin base that was supposed to record the motion of the pen. Then you were supposed to be able to connect the base to your PC and upload your notes as PDFs
This sounded really useful. It cost about $150 but if it worked as stated it would have been worth it ... but it didn't and it wasn't.
Back to the iPad. Yes it's not cheap, but once you have it you can download amazing apps like Notes Plus for just a couple of dollars. The iPad (and its associated eco-system) really does change everything...