I have two Fluval 305 canister filters for my Perfecto freshwater 120 gallon high (60x18x26). I am not sure if I have the filter's intake and output in the ideal positions. Please see diagram attached.
Location: Tired of the mod power plays; gone to another forum
Your flow is fine, you can't really go wrong (just better). The idea is to get the wter circulating so any suspended things in the water make it back near the intake. If it was SW then you'd want to take more care.
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.