500 Gal. upgrade question

[alc11]

I have a 125 gallen tank with a 7-8inch Rec. and a few other fish. I am planning on rehoming all but the Rec. and upgrading to a 500gal. tank the 2 layout I'm currently looking at are 96x49 1/2 x 24 1/2 or a 130 x 31 1/2 x 30 1/2. I am planning on getting 2 Motoro and an arowana, and I would also like to get 2 BD once I save up for them, just cant afford the fish tank and 3-6000 in fish at the same time. Planning on a sump for Filtation. Would appreciate any suggestion or coment of which layout would be best long turm I am not planning on upgrading again after this. Where I live you cant sale large aquaims for much more than $1 gallon. Also what size sump would you recomend, I need it to fit under the tank. Thanks

 

[alc11]

Any suggestions would be greatly welcomed

 

[vamptrev]

Deff go for the wider tank. 4x8 are great footprint for about 4 large rays

I would build a diy sump under the tank. Use big rubbermaid tub

 

[alc11]

thanks