So ive been looking at the Sennheiser headphones (I would also gladly appreciate any other suggestions) and ive narrowed it down to a few. Ive mainly been looking at the PXC 450 model which has a frequency of 8-28000hz. The 450 model is pretty pricey, mostly because of the noise cancellation and talk through feature, but the other models ive been looking at dont go as low as 8 hz. I guess my main question is does it make a huge difference between 8,10 and 12 hz because the 100 or so dollar cheaper models have around a 10 to 38,500hz frequency which is considerably higher. So i guess my other question would be is 10,000hz higher a huge difference. Thanks for any help you can give guys