Harbeth P3 vs KEF LS50W

I haven’t found any Rega Dac for a good price yet.. I read that the -r model does include remote and has higher bit rate through USB, other than that the sound is the same as the former model. Can you confirm that, and help me understand what cables I need to connect my MacBook and amp? My mac is a 2008 year model.

Is it RCA from amp to DAC and USB, optical etc from DAC to MacBook?

Since I don’t have a DAC for now and would like to connect the amp to MacBook, what cable do I need?

I ordered Qed 79 speaker cables as I read much on HUG about them and Harbeth. But I don’t have a clue about the other cables, decent brand/model to start with..

Thanks.

I owned a pair of Harbeth P3ESR amplified by Exposure 2010s2. I moved to KEF LS50 Wireless after one month of owning both, comparing.
Now, nothing touches vocals and small scale acoustic instruments on the Harbeth at low to moderate volume. Nothing that I've heard anyway.
If you listen to low-medium volume late at night to jazz, vocals, acoustic, folk, etc, Harbeth is the way to go.
The problem for me is I don't just listen to that, I like from time to time to up the volume and throw in other music genres.
The active KEFs get to about 90-95% of Harbeth's strengths with added scale, authority, bass, everything. When pushed to higher volumes the P3s start to compress, they are not a dynamic speaker. Not so with KEFs, these speakers maintain the low volume magic and "scale up" with added volume. What these things do with music is amazing.
To get to KEF's level of performance you will have to spend an obscene amount of money on separate components.
Not to mention I sold my dac, amplifier and streamer.

I wish the LS50 wireless would work for me.  But since I listen primarily to analog, the last thing I want to do is pass the phono signal through a DAC.  It's too bad there isn't an analog pass through or something like that to allow you to skip the DAC altogether. 

I just sold my Audience the One as my desktop speakers because i found them fatiguing especially with modern pop music-I listen to a wide variety of music, from EDM to classical, I am looking for a relaxing non fatiguing but still detailed and musical- I am planning to run with a sub- I am debating between the Harbeths or the LS-50 wireless- I am leaning for the KEFs but concerned with long term reliability - although I know KEf is a well established company 

For my office system I am using the P3ESRs with Rega equipment; Brio (newer version), DAC-R, Apollo (newer version).  For my office (14 x 14 x 8) it is perfect but I have not really turned the volume up very loud.  At the levels I listen to the sound is very clean and without any digital glare.  The Rega Brio and Harbeths go well together.