Though I have an all 1/8" chain/cog/chainring combo, I've seen mentioned here that an all 3/32" combo is quieter. If you experience any noise, just use Phil's tenacious oil. I did and makes my bike very stealthy. (there are other things one need to do after applying the tenacious lube)

Now, a wide chain and narrow chainring or cog, would seem like it may create noise, specially when chainline isn't perfect. Try the above solution. Otherwise, I don't think there is anything wrong using your setup.