I use Forest Bark. Its like Repti-Bark, but is 100% better. Its guranteed no fungal growth, and you can mist it all you want and it wont get soggy like Newspaper or somtimes aspen. It looks alot better than the 2 also. Only draw back is you have to check for waste and take alot more substrate out than you would want. I personally take a 1x1 inch square out where the waste is touching, just to be sure i didnt miss anything.
Its also re-usable, just soak in hot water and swish around for 5-10 minutes until clean. I dont do this, i just replace it toatally every time its starts to get old.(4-5 months) I go through about 2 24qt bags a year....It hold humidity very well, and when heated slowly releases it. I can mist twice a week and the humidity will stay around 65-70%...100% shed rate.