Is there any Streamer/DAC/Preamp good enough to replace a dedicated standalone preamp?

I am getting into digital music server, considering a streamer/DAC/preamp unit like the the Brooklyn Bridge or Teac NT-505.    Has anyone compared its Preamp section against a good dedicated preamp?   I currently have the Conrad Johnson ACT2 and see if I can eliminate a component/cable in the chain without much sacrifice in sound quality.

Elac Alchemy DDP-2 ($2,500). Peter Madnik of Constellation Audio and Audio Alchemy designed it, and I have the DDP-1. Excellent DAC and Preamp with Streaming. The low cost is not how these sound. The streaming part, I have no experience with, but the other parts are of sound that you would get with something 4 times as expensive. The Simaudio Moon is nice, but uses ESS chip. I like AKM chips with programable FPGA and filter choices. Sounds more analog, to me.
PS Audio Direct Stream might be worth a look...
I have the PS Audio DSD.  I though I might get away with eliminating a component and I was wrong.  It's preamp stage will not match the CJ.  It is fine and is better than entry level preamps but won't hold up against a really good one. .