I have, and am very pleased with, an MAE T Series Bushless moderator. They are stainless steel and are partially over-barrel so not only are they durable but also they don't stick out too far over the muzzle.
The best noise reduction I have come across using my mk1 ear is the Jet-Z, and while they are mild steel if you look after them they last a very long time. But they are very heavy.
I have used the Roedale and CMM4 and they are very light, if you are taking very few shots and walking long distances (where weight would or could be an issue) then they could be worth a look at.
But given the choice of metals available I would go for stainless steel every time and my choice would be between the MAE T series or the SL5.
And yes I have had titanium moderators and I would still go for the stainless suppressors every time, they are far better value for money.
Simon