I've always been very impressed with TBAC Ultra 7 and 9 cans. For a 1.5 diameter suppressor I think they are as good as it gets so if you are only looking at 1.5 diameter cans that is what I would get.
But, if you don't mind a suppressor that is a little larger in diameter the Dead Air Nomad Ti XC is very impressive. It is a 1.76 dia can but is actually slightly lighter and a little shorter then the TBAC Ultra 7 but is as quiet or quieter then the Ultra 9.
I got the longer LTi XC version last fall and it is nothing short of impressive and the shorter Ti XC is nearly as quiet.
There are a lot of really great suppressors out there on the market so don't get in a hurry and do your research. The guys at TBAC do a great job of testing/comparing as many different suppressors as they can get there hands on and they don't ever do anything to tip the scales in their favor they test them all the same and report the results. If that means a competitors can meters better then theirs they post the results. Take a look at their 2024 Silencer Summit results. It can make your head swim a bit because the record so much information but it'll still give you some idea of how they compared.
https://thunderbeastarms.com/sound/summit2024/