I like the top one but would place them a bit asymetrical.
Or add some fake hanging plants in one corner.
My gar likes to hang out in those hanging plants.
I envy you, i'm gonna run a new tank and still have to find some wood I like.
Wish I was rearanging allready....
Question is, which one does the Gar prefer? Put them both in and see which one he gravitates towards, that one will be your winner. You can make any piece look good, but you can't make your fish like any particular piece.