Finding a saddle that’s comfortable for you is a very personal thing. (Which is why I never let one of my students buy a saddle without me going with them to look, getting one that feels the best to them in the store on trial for a week, and watching how they ride in it.)
That said, I’ve been teaching and training for (ack!) more decades that I care to admit on a public forum - and more lessons than I could ever count. By far, the most comfortable and popular of the lesson saddles I own and use is a Toulouse. As a result of riding in this saddle in lessons, more than a few of my students - again over a period of years - have chosen a Toulouse as their own personal saddle.
My recommendation is that you do NOT buy on brand name only. Sit in many saddles - ask your friends or your trainer if you can try theirs. Go to more than one tack shop and sit in as many as you can. Then decide which one(s) to try.
Even if you can only afford a used saddle, make an appointment with a knowledgeable saddle fitter and listen to what they have to say about your position and how a particular model affects that position. They can help you find a used saddle too.
Then confer with your trainer on what he/she sees.
Look, this is a big investment. You’re going to have this saddle for years. So take the time to do it right.