I've played and tried out MANY aluminum snares including all that have been mentioned in this thread. I have found that certain snares that sounded superb while testing alone in a room in a controlled setting actually fell short and I was disappointed in when played in the context of a live band. These are my personal recommendations regarding sonically, feel, hardware durability, build quality and playability in a live band setting.
If you are on a very tight budget then the Acro is the way to go. Cheap, nice sound and feel and works well playing live. It's a sleeper snare for sure and you can play it while saving up for one of the snares I'm about to mention ;-)
If you have more to spend but don't want to break the bank I have found that the Yamaha RC Aluminum or Tama SLP Super-Aluminium are absolutely the way to go. They're amazing sonically, have incredible feel but also have the hardware durability that you will never need to worry about or have to upgrade. More importantly though, they sound awesome in the mix and context of a live band.
If money isn't an issue, then my first choice would be the Dunnett 2n. Phenomenal sound, feel, build quality and hardware durability and it sounds superb live. The next choice is the Joyful Noise. IMO though, the Dunnett 2n ticks all the boxes of the Joyful Noise but at a lesser price.
The Ludwig LM400 is a great sounding snare no doubt. It's a legend for a reason. IMO though, there are just too many other snares that sonically sound just as good or better and work equally as well in a band setting but have superior build quality and durability over the LM 400.
As others have stated though, play and listen to as many as you can and pick the one that ticks all the boxes that are most important to you...and that fits in your budget.
