the thing is that you have to take in to account that,
1)$99 will get you a ER-6i (basic level balanced armiture)
2)$150 will get you a pair of Future sonics Atrio M5 (best dynamic Driver IEMS currently on sale)
3)$200 will get you a pair of Super.fi 5 which are allready Mid High level balanced armiture Canalphones, or a pair of ER-4P which are one of the best balanced armiture canalphones,
so, these all seem to be dynamic driver headphones from the shape,
and the competition i just posted above, sennheiser has to be very very carefull with pricing and sound quality, im not talking about competition from crossroads and jaben, im talking about established companies,
sennsheiser in my opinion is in a weak position here, becuase most people who dont know about sound will probobly prefer a pair of sony, philips or panasonic, while people who do know will go to ultimate ears, etymotic and future sonics, so im saying that the top of the range here CANT excede $100 and the normal ones should be around $30-$40 to stay competitive,