Which DAC would fit me best?


I would appreciate any help that I can get, as I've been reading reviews of DACs for the past week and have no idea what to get.
-My budget is $400, I'd like to spend less, but let me know
-My headphones are BD DT880 '03
-My amp is a Little Dot MKIII
-I'm using my MacBookPro as my source
As far as music choices go, I like to listen to some modern Rock, Jazz, Classical; so a pretty fair range.

I know it all boils down to just jumping an picking one, but I'd love to see if anyone had any specific recommendations based upon my setup.
csommers
The DAC1 from Benchmark has a good headphone amp. I'd get that if I were looking for a cheap DAC to use with high quality headphones. I doubt you will find it used for much less than $800 though.
Used Benchamrk Dac 1 w/o usb - cheapest I have see here though was $675. Definately worth it if you can swing it.
I've heard really good things about the $400 Cambrige Audio DacMagic - balanced outboard DAC. I've not heard it myself, but I know two people who told me that it is a fantastic bargain. It has been getting good press too. If I was in the market for a $400 DAC, I would definitely want to audition this one.
http://www.computeraudiophile.com/cambridge-audio-dacmagic
At $400 I would look for a used Paradisea here on AGon. My Musiland MD10 (USB)($300 new)is great, but the Paradisea is better.

Just guessing, but I think the Paradisea would also beat the Dac Magic.