Welcome to Head-Fi. I am sorry and will apologize on behalf of the lesser...mature Head-Fi'ers we have. The Tour's are never recommended due to how bad they are for the price and if you can, should be swapped and should be swapped for something like the TF10 or GR07. don't have those two but they are very popular. you can look into them. but otherwise. I have never tried my E5 (more or les the same) with a sensitive IEM. but the tour's and other consumer earbuds should not be sensitive at all and should pair nicely with the E6. if the hiss sounded too much for you on ur other consumer earbuds. then i doubt you would get better results with the tours. I just had a person in my last class tell me his tours just broke.
So basically; does it hiss a lot on your other "consumer" or regular earbud In your opinion? If yes, then it should deliver close results on the Tours (should, don't know)
If you can easily return it. i would say to go look at the GR07 or TF10. the TF10 has many reviews and you will see. it's MSRP price is $460 after tax, but is sold currently @ $160 and can be bought for $100 during deal times. so if you see reviews on it that have an outrageously higher price than what you saw on amazon. it's bc the retailers dropped the price by a lot.
they are both loved on Head-Fi, but you might still get the hiss problem the E6 is a beginner amp. most use better amp's with the IEM's
any questions?