Thank you for the quick replies by the way I appreciate the feedback. I had finally decided on the DT 990's after doing some more research after someone recommended the 770's/880's and really thought i'd get an open headphone.
My big thing with Amp/DAC's is just not understanding as much about it as I should so I agree, I should do some more research lol. One last question, the E10 with have adequte power to push the 250 Ohm's right? Im looking over specifications and reviews (Now im thinking about the E17 as well as its just a tad over my budget but includes capabilites to use S/PDIF interface) and see according to Fiio's website E10's recommended impedeance is between 10-150 Ohms.