Last time I worked with a Soundtracs board was twelve years ago.
It wasn't a bad sounding board. I did three full length albums with it at an old friend's studio. That was also the last time I recorded to analog - he had a high mileage 16 track MCI. When he went digital he sold off both. I should have grabbed them when I had the chance.

I've never worked with the other's you mentioned.

thanks
do you know i want a mixer with minimum 40 inputs.. and analog..

I remember when these 2 companies were very popular in the 80s-90s.
Soundtracs were usually found in the smaller studios, D & R desks were found in larger studios, competing directly with the Amek line-up.
I worked in Atlanta on a D&R in the early 90s, and it sounded at least as good as the Amek Angela I had owned previously. In addition, the Dutch board had a much more robust power supply than any of the Ameks or Soundcrafts I had seen then. Today, D&R STILL makes the Cinemix, using modern analog componentry under digital control. Their founder, Duco, who designed all of their analog products is still onboard with them. Furthermore, their website claims that they support all of their products for at least 10 years after their manufacture with service parts. This would be a powerful reason to go with them...
Soundtracs' listing on the Digico website only gives an e-mail address to a tech support rep. They no longer make any analog products, I doubt that parts are easily ordered from them. You might look them up and contact them for some firminformation regarding this.
Many times when folks get on this forum and ask about older analog boards-AMEK, Soundcraft, MCI, D&R, Soundtracs, etc- us old farts have to remind them that servicing and support , while certainly not impossible to receive, are getting spotty and harder to find. And this can be aggravated by the geographic location of the gear. Are you in Europe? Africa? South America? Indonesia? This will determine how easy it is to get support. Something to consider besides # of inputs and knobs on the board...