I agree with 58, beauty is in the eye of the beholder. If you like then who cares right? You have to stare at it all the time. Now with that being said....
For me, I like the second one better then the first. BUT....
I'd like to see rocks on each side. One side higher then the other, then for the center I like the little thing you going on so you can incorporate it into that scape. Like a bridge of corals and at the same time gaining a awesome tunnel and together giving the tank depth and the appearance of being bigger.
I think it would open the tank up but yet give it a bigger look. You'll gain some more room on the sand bed also for maybe a nice garden of zoas or brains, you get the point.
Don't get me wrong the tank looks awesome bro. Just being honest. I'd want someone to tell me the truth instead of always hearing the same thing lol. I know you know where I'm coming from and you know I respect you a lot.