Huh, never even heard of the Mad Dogs, thanks for letting me know! The AKG K550s were up with the Sony MDR 7520s as a couple interests... Thing is the amp is not certain, so just to be safe I'm looking for a pair that'll deliver (as much as it can) without it. Thanks for the advice!

Hey guys, So I figure I should provide a bit of backstory here, first time poster, and I also just made my first real audiophile-level headphone purchase: a kick ass pair of HD650s. I saved up and finally decided to spend the money for a good pair of headphones after gradually increasing the...