I personally use an ipod and a belkin recorder. It works really well and is discrete.
The last time I went I stood on the stage and set it on there, but the ipod on hold with the settings to "best Qual" and it came out great.
ps I put a piece of black electrical tape over the light. The recorder was like 20 something, and if you really dont like it after you can return things to the apple store within two weeks opened without the restocking fee...