To Dac or not to Dac

Can't comment on either of your choices but there is a like new Peachtree Audio "MusicBox"currently for sale here on Audiogon(NOT mine)priced just under your budget.I have one driving a pair of Sonus Faber Toy Monitors with an Asus laptop as source & it sounds AMAZING!
The "MusicBox" has Multiple Digital Inputs,Direct Digital iPod Dock,a 12AX7 Dual Triode Tube that not only drives the PreAmp section(with PreAmp outputs to feed your NAD)but also drives a wonderful sounding HEADPHONE Amp AND even includes a kick ass little 20wpc.Mosfet Amplifier!
ABSOLUTELY THE BARGAIN OF THE CENTURY!!!

Thank you,
My choices were not etched in stone, but were price driven models. Thanks for your input on the Cam and the Peach.

Dac it up. Stay away from tube DAC's, haven't heard a good one yet.

Tmsorosk,
As living techie I can tell that tube DACs are only for audiophile community. All they do is show glowing tubes inside the chassis. They've been placed on the output stage, but all we perfectly know that to make a computer processor out of tubes takes a space larger than fridge in your kitchen!

Put that $500 towards better speakers or save your cash.