Bite,
Creating an outline yourself is a great idea.
One more thing that I would like to add. Finding out about the historical purpose of the book in a few words is helpful and also fairly easy. You can find out the intended audience and the purpose of the book usually with a quick web search, often on wiki. This gives a good framework to understand the book. For example, Matthew was written in Hebrew to the Jewish people, so you would expect lots about the Mosaic Law b/c and Jewish perspective that is what they were familiar with.
Sounds like you have a concordance, which is helpful when looking up a very specific topic or a word study, but outside of that it is not that useful. I would recommend getting a bible dictionary (I like the Holman Dictionary) and a topical bible index (I like MacArthur's topical bible index) to complement your concordance.
Also, if you dont have any study bibles I would recommend getting a few; the NIV study bible, Reformation study bible, New Jerusalem study bible, MacArthur Study bible are all good. The study bibles are good for their text note, and some have mini essays in them. I think that it is good to have a wide perspective on biblical issues. In line with a study bible would be a good commentary, I have several but the Matthew Henry commentary seems to be the best to me. They wrote their commentary some time back and in several volumes, but you can get it in updated English and in one volume, mine is the one published by Zondervan.
When you are ready to get really deep look into a Systematic Theology book. They are very weighty and slow read but extremely valuable in getting really deep into specific topics, usually somewhere around 1,000-1,500 pages long. They are a slow read, takes up to a year to go though one and really understand it.
For the audio. It largely depends on what translation you want, but I happen to have one for the English Standard Version. There are problems with every translation, though the differences between translations are minor (with the exception of the NWT), but I find the ESV to be fair and readable. So, I went with The Listener's Bible narrated by Max McLean for the ESV. I think that this series comes in several different translations. It cost about 50 US dollars and came on four MP3 CDs. Max is a very good reader and I believe that he is a professional storyteller. Sometimes he is a bit high falutin in his reading which takes a bit to get used to, but most often it is warranted when he speaks like that. If I read the King James I think that I would have to go with James Early Jones reading, how cool would that be to hear him read the bible. Unfortunately he only does KJ.
All this can get really expensive, it took me a few years to build up my library and it still needs growing. Take your time and let God's word pour over you.
