best DAC for streaming to my 2 channel system?

I have Odyessey Mono Amps
Accuphase pre c200
Rega Apollo R
Rega RP1 w/blue Ortofon
2ce's with 2 Vandersteen subs

Want to stream from a Mac Book and also run CD player through it.

I dont have choices close to audition and the one I did I liked the way it improved soundstage of the CD player

Well, it seems that you like Rega equipment, and rightfully so. Perhaps whatever it was that you listened to or a Rega DAC would be in order. If memory serves, the Rega will accommodate coax, toslink and usb.

There may be many who will disagree with me, but I've found that once you get into a price range and stick with reputable manufacturers, the question becomes one of what you prefer; and less a matter of trying to avoid crap equipment.

If you can buy used, I wouldn't burn up too many brain cells on this issue. In your budget range, there's lots to choose from and I'd say that ALMOST all of it is going to be at least good.

Wyred4sound dac1 would be a good choice, $995 new. More inputs than most DAcs in this price range, asyncronous USB.

I am currently using a PS audio Digital Link 3 with a M2Tech hiface USB/SPDIF converter which avoids need for a USB cable. As these items can be found used on AG and both could be bought for a total ~$550 it represents a great sonic value. Down side is that the PS DAc only has a single COax input so CD player would have to use the optical. This is also true for the Rega.