TASCAM DR-100 MK2 & SONY MDR-7506 Phones

["shooze53" shooze53]

Hello all,  
 I need some advice please, I recently purchased a DR-100MK2 to do some field 
recording and am now looking for headphones to match the recorder. I am 
considering the MDR-7506 phones, and from what I read, these are industry 
standard for live recording application.  Am I on the right path here?  I 
notice the impedance of those phones and recorder are unmatched, but is that 
really an issue??  I will also be using these in loud environments as well to 
monitor audio I am recording (live music), and hope the amp in the Tascam is 
sufficient to drive the Sony phones to full fidelity?!

Any advice would be most helpful - I have a budget around $100.00 for the new 
phones.

I have a pair of Sennheiser HD433's that I use for general listening, but they 
are not sufficient for monitoring in the field due to boosted bass response and 
open air design.

Thanks in advance,
Scott