I've never finished Acacia, but I thought the variation was naturally occurring. I would make up a sample board with various stains + topcoats to see what it looks like.
I tend to favor oil based stains with a lacquer topcoat.

 

For all the acacia I've played with, the most I'd do is add oil and/or poly. The results have been so pleasing I wish I had more.

My brother gave me his tree and I fell in love with it from the first sanding. Enough so I started looking into getting more. I was surprised to learn research takes you to olive wood.

You might turn it over and flood the back with BLO, then a coat of poly to see what you think. If it isn't enough, then you can turn to your test pieces.

 

I use dyes rather than stains. You probably don't want a lot of color. You don't mention how you plan to finish it, but here's some info on using oil based poly, any color/intensity you want. The same can be done with Transtint dyes using a clear stain base (I use Target WR4000). Any WB finish can be diluted ~3 or 4 parts water to 1 part finish for a stain base, but the oil emulsion in the WR4000 really brings out the grain much better. Dyes give color without obscuring the grain like pigment stain, which would be a shame with such beautiful grain.