I need one with very good sound quality playback. (Understandable when listening back to voice lectures) I sit on the front and the closest distance from the professor and me is about 5-6 feet apart. The price range should be under $100.

if you have experience with a certain didgital recorder feel free to mention it.

Please don't mention any mp3 players. i know there are some out there that can record for up to hours but I already have a mp3 player on my phone.