If you are looking for a decent value for money voice recorder, then you can't go far wrong with the Sony ICD-PX312 - Digital voice recorder - flash 2.
As the product description states it is an "entry level" device, but it is fair to say that it is loaded with quite a few useful functions, ie 2GB of built in memory as well as a Memory Card slot, incorporated MP3 and many more features. (See the description for yourself).
I particularly like the file system. Just connect to a PC / laptop etc and open up the files. From there it's quite simple to re-arrange and re-name files exactly as you would normally on your PC.
The microphone is exceptionally responsive and easily picks up voices from across a room. I found that the clarity of the playback is quite good using plug in earphones or when played back on a PC/ Music player system, but on the downside the built in speaker quality is quite tinny and poor.
I personally found that the dimensions of the recorder are clumsy. It should have been made shorter and wider, more like a mobile phone. This would also have made it possible to have a larger display screen, as it certainly is not "a large LCD display" as described in the product info.
However, all in all we get what we pay for so at this price(£36.56 at the time of writing this review), it represents fair value for money..................... But my advice is if you want high quality playback from a voice recorder (from it's own speaker), you really need to up your game and look at paying a lot more money for a higher quality device.
** At this price you will never get the same quality playback that was achieved with the old cassette type recorders **