Best combination of Tamagotchi MIX

Hello people!
I am writing because I am very lost and I do not know what to do.
When the first Tamagotchi MIX came out, I bought the two models (Melody and Spacy), I thought they would be the only tamagotchi of that type and I knew that it took at least two to unlock all the destinations in one of them ... so I did not think about it twice.
Then they went out more and more, and I regretted buying two practically the same (except for a couple of characters). Especially I regretted when the version of Sanrio came out, with those adorable characters.
I must say that the MIX is not my favorite tamagotchi, but although I feel that it lacks a "objective" (as are the happy symbols), it is good to play relaxed without counting failures of care and keep a time those characters that I love. But with the arrival of Tamagotchi Meets (hype!) I do not know whether to sell the Spacy and buy a Sanrio (and use the Melody to unlock destinations in the new one) ... I feel that the mixes would be more beautiful. Or I wait until I see the other versions of Tamagotchi Meets that will come out and then sell the Tamagotchi Spacy (but maybe then it has come down in price...).
The only thing I know is that with the arrival of the new wave of tamagotchi MIX, improving the gameplay by adding new options, I have one Tamagotchi MIX that is surplus ... I would even say that sell the two (Melody and Spacy) and simply buy Sanrio and Meets, but maybe I would have the destinations of one blocked...
Help please! What would you do?
And sorry for my bad english

I personally think an anniversary m!x is the best m!x, maybe i'm biased becuase it was my first but I say that because you can unlock all the locations without a different tamagotchi. That said, I also own a Sanrio M!X. Maybe you could sell the Spacey now while the price is still high and purchase a Meets when they come out? Just as long as your other M!X has all its locations and you don't need the Spacey anymore. I'm not even sure that I'm gonna get the meets until I see more about them, their features and objectives, see if theyre any different than M!Xes, because I'm plenty happy with the two I have right now honestly. Though, that's just me. Good luck!

Oh, thank you very much, I did not think I'd get an answer so fast!
I did not know that the MIX anniversary did not need another tamagotchi to unlock ... anyway, personally I do not like the destinations and characters that it brings.
In MIX Melody I have all the destinations unlocked, however, if I sell the Spacy now and in a few months I buy the Meets, if the latter needs different connections to unlock destinations I would lose those of Melody (Jellytchi and Pichipitchi I like very much, that's why a option is to stay Melody and buy Sanrio, then in one of the two I will have insurance... but I don't know).

Would connecting with the meets allow you to unlock m!x locations?

I guess so, since they are unlocked by connecting to another MIX and the Meets does not stop being one... although I may be wrong.