How can a PS Audio Perfect Wave DAC enhance my system?

I am presuming that the PS Audio DAC has S/PDIF inputs so yes you can play Redbook CD.  You won’t be able to play the SACD layer of your small SACD collection so just continue to play them as you currently do

I run my PSA DSD through my VTL 7.5iii preamp. It sounds miles better than directly from DAC to amp. Cannot spoeak to your preamp talents. Try both.

I have used digital from the first CDP - the Magnavox CDP 650 -- since around 1986, and have had CDP's and numerous DAC's throughout. The PSA DSD is a first rate, top-of-the-line DAC, not least of which included the free upgrades from PSA. I have not been moved to look into a newer DAC in a few years, especially when I installed the Bridge II as a streamer. It all sounds glorious and functions very well. The Shunyata Sigma IC's were the topping on the cake running  from DAC to pre and pre to amp. Neal

With the Bridge II do you stream from a DLNA server across Ethernet?

@r042wal 

PS Audio preamp section can be bypassed. You will run it into your McIntosh preamp. You Marantz SACD player will be connected to another input on you preamp and you can use it to spin CDs. Your Popcorn server can be connected to the PS Audio DAC via coax. You need to research if popcorn outputs all your music formats thru coax and if PS Audio is capable of processing these formats via its coax input. If all this checks out the odds are the PS Audio DAC will be a nice improvement over the dac in your Marantz. Will it be a big difference only you can draw that conclusion. 

I would like to thank everyone who has contributed and helped me with my decision to add a DAC to my system.  My window of opportunity was closing so I went ahead and purchased the PS Audio Perfect Wave DAC Mk II with Bridge.  I am currently waiting for shipment.

If no one objects, could we use this same thread while I look for your advise on integrating this into my setup?

I plan to keep my McIntosh C48 preamp in my system.  Knowing the PSA has a bridge card will make it easy to stream my digital files on my Popcorn Hour A-500.

The C48 has several digital inputs apart from the conventional RCA inputs.  There is a USB, optical, and cable input.  Also, there is an XLR balanced input and I believe you can take something like PHONO1 or PHONO2 and swap that source to balanced input.  I will check the manual.

I would like to run my Marantz SACD through the PSA too.  The only digital outputs on this are optical and coax.  I just learned the optical connection is limited in its sampling rate.  

In advance, thanks to everyone.