Which DAC: Benchmark, Mytek, Audio Mirror, Holo Audio, Mojo Audio?

Looking to upgrade my current Rega DAC-R and have been doing some internet searching and these DACs look interesting and fit within my price range:
BENCHMARK - DAC3 B - $1700
MYTEK DIGITAL Mytek - Liberty DAC - $1000

Audio Mirror - TUBADOUR III DAC - $1200
Holo Audio – Spring DAC 2/3 - $1900-2700
Mojo Audio - Mystique v2 SE DAC - $2500
The other option is to just stick with the Rega DAC-R
I play CDs only and would like to maximize that format. Anyone have experience with these DACs? I have no opportunity to audition them where I live.

Which DAC would provide the most significant upgrade from the Rega? The Rega frames the music well and sounds good with almost every disc I throw at it. I’m not shooting for different and I don’t want something that will limit what's  enjoyable (CDs or types of music).
The Mytek Brooklyn is the closest to the Liberty I have heard. What I've written about a great deal here is how good it sounds with Redbook.

Before this generation of DAC's (which I aslo include Schiit) there was a really wide performance difference between hi res and Redbook. We attributed it usually to the format, but the Brooklyn and Schiit really make you question that assumption. They do really an awesome job with Redbook to the point of not making hi rez a necessity anymore.
Here is a thought: Stick to Stereophiles A+ list.

These are all within reach especially if you consider used. All are good. All could be resold fairly easily. Benchmark, Exasound and Mytek are more pro studio sounding (front row seat attention grabbing detail). Some of the others will tend to be more laid back (row 5-10 and consequently more soundstage depth). All are good (A+) and only your taste will determine what works better for you.

Auralic Vega
Benchmark DAC 3
Bryston BDA 3
Exasound E38
Mytek Manhattan II
PS PW Directstream

there are so many combinations soundwise,  it will keep you so busy you won't think about another dac.
musical paradise mp-d2 mk3
I can't compare to your current DAC or any that you listed, but I do have a Mytek Liberty and am quite happy with it.  It's in my 2nd system feeding a Heed Elixir integrated amp.  The source is my PC via USB (it's an old Dell XPS system, no special sound card or anything else in the chain).  It's very neutral and detailed. 

I tried it in my main system in place of my Auralic Vega and quickly switched back to the Vega which has a more refined and "analog" sound that is easier to listen to. 

I like that the Liberty does MQA and can't really find any fault with it, other than that it might be a little "clinical" but it's not in the same league as the Vega.

The Liberty bests my Wyred 4 Sound DAC 2.  The DAC in my Sony TA-ZH1ES headphone amplifier is a little more refined than the Liberty. 
I am not as versed in the digital side of this hobby but have an NAD M51 DAC that I have been wondering if I can do better.  So I suppose I am back in the hunt for a do it all DAC that can make a CLEAR difference in the sound coming from multiple sources. (streamer, transport, server, etc...)  
How would the DAC's mentioned stack up with the M51 and how would a reclocker make a difference in the lineup as well?