Is this to be used unamped from something like an iPod?
Have not heard the Sony, but from what I have read they are too bassy and colored to mesh well with classical music. I have only briefly heard the Mag Dogs, so can offer no helpful opinion about them.
No amp knocks out some excellent options, like the Shure SRH 940.
That lead us to mostly portable cans like the Senn Amperior (or little brother the HD25-1 II) and Audio Technica ATHESW9A Portable Wooden Headphones.
If you can still find it, the Sony MDR-V900HD is also a good choice and should be quite a bit below budget.
Edited by KG Jag - 1/17/13 at 11:30am