Plato: The Last Days of Socrates

Starting small, I know.
I found this book sitting on my brother's desk and nicked it straight away. I felt that any hopeful student of Philosophy should be well acquainted with these most epic of names.
It is the Penguin Classics version - translated by Hugh Tredennick and Harold Tarrant, with notes by Harold Tarrant. Is this the most well known/only version available?
I have just finished "Apology". According to Tarrants' notes, Socrates did himself no favours during the trial, and this much became evident in reading "Apology". Although I speak no Greek, I assume the tone of superiority and almost flippancy in the English translation was very well preserved from the original.
"I tried to persuade each one of you not to think more of practical advantages than of his mental and moral well-being... What do I deserve for behaving in this way? Some reward, gentlemen, if I am bound to suggest what I really deserve". Although this is a short quote and not representative of the whole text (in which far more time is spend professing his lack of wisdom than making inflammatory comments like this one), it is evident that Socrates' concern was not life or death, but upholding his moral standards at any cost. I imagine this is what sets him apart, and renders his name a household term, setting him down in history as one of those incredible people whose mind was not constricted by context, and who ultimately pays the ultimate Earthly price.

Of course, this is Plato's recreation of the scene, and as Tarrants' introduction specifies, the work was not necessarily written within a decade of Socrates' death. Obvious consequences aside, such as the possible warping of memories over time, and the purpose for which Plato wrote this, I would really like to know of ay other recounts by Socrate's other followers - perspectives other than Plato's, just to try and piece together a broader picture of the philosopher himself. Any suggestions?

One more thing: Socrates is obviously a pious man by his own definition, if not by that of the Athenian court. As a modern reader and an atheist, how should process his claims of divine instruction? This "voice" of God that speaks to him whenever he is about to do wrong. I don't want my immediate assumption that such things are not possible to influence my reading or valuing of the text or the man himself. Is it possible that he was using this as an excuse to simply act as he pleased in Athenian life? Did he have a highly developed sense of intuition, or a mental capacity simply so enormous that he was able to objectively evaluate and predict the outcomes of his actions as he was undertaking them? Is he mocking the people of Athens and their comparatively blind faith?