I think it looks good too. The two intakes are at opposite ends of the tank, so they are drawing in "dirty" water from different places. The outflows are pointed away from each other so they don't simply create an area of turbulence. Also, the intake of one filter is not pulling the clean water from the other filter right back in. It looks like you thought it out well! You may need to move some decorations as you said, but the placement of the intakes and outflows look good.