Marantz cd players


Looking for some advice on a possible purchase I’m planning. 
I have been presented with a few good deals on a couple of different Marantz cd players.
1. Is a Marantz sa-10
2. Is a Marantz ki-ruby 
3 is a Marantz sa-30
Looking for the pros and cons and the benefits of each one over the other. 
I am looking at the Marantz brand because I am Familiar with the brand and something I have always had good luck with. 
Thanks for the help/advice

thedoc2004

I have the SA-10, which replaced a Sony 5400-ES.  When I got the Sony 5400ES and played an SACD vs. the same redbook CD the quality difference in the sound was readily apparent, so I wanted to stick with SACD.  I did extensive research before choosing the SA-10, which I judged to be the best alternative to the PS Audio Directstream, which went out of production at the time.  I like that the Marantz converts everything to DSD using it's own technology, not an R2R and not a chip per se.  I also use the DAC with a COAX cable from my ifi streamer.  The DAC is said to be high quality when used this way, but there haven't been any reviews I could find that compares it to a separate DAC.  When choosing the SA-10, I put it up against the $20k SACD players, which I thought were too expensive and the Technics, which has MQA and was much less expensive but has MQA.  I thought I'd be giving up MQA cd's, but apparently those never took off and now I hear MQA isn't that great, too.  The SA-10 may be a little dated in some aspects, but it's built like a tank.  A retailer wanted full list price for it, but I got an open box for about 40% less, which I thought was a good tradeoff.  I think it will hold it's value.  The technology is unique and build quality is top notch.  The sound is great; I just don't A/B it against anything else.  I did like the Sony 5400 though and haven't had the heart to part with it.  The rest of my system is a Luxman AX590ii integrated and Yamaha NS-5000 speakers.  I consider it to be a great value compact reference system that should stand the test of time.

Absolute Sound just came out with a glowing review of the Technics SL-G700M2 by Anthony Cordesman.

There's another one from Twittering Machines that's not as effusive but still positive.

All the best,
Nonoise

Right now you can pick up the Marantz sa-10 for $3500 that’s a $4000 savings so I was really looking at it. But I was able to pick up the Marantz KI-Ruby for just over half it’s normal price of $4000. It was a really hard call to make but I am really enjoying the Ruby. I don’t use the Dac in the Marantz but I have heard it’s a really good one on both the Ruby and the Sa-10.