To me, the LTA and Sachs preamps represent something really special sonicwise that far transcends connectivity type. I honestly don't know which one I'd choose -- probably come down to features and/or price, but hard to see going wrong either way. If you're hell-bent on going balanced for some reason, my first choice would be Ralph's MP3 like this one...
http://www.audioasylumtrader.com/ca/listing/Preamplifier-Tube/Atma-Sphere/MP-3-MK3.3-Latest-version/...
There's also Backert, which is also really good, but I wouldn't choose it over any of the above. Best of luck.
http://www.audioasylumtrader.com/ca/listing/Preamplifier-Tube/Atma-Sphere/MP-3-MK3.3-Latest-version/...
There's also Backert, which is also really good, but I wouldn't choose it over any of the above. Best of luck.