Just measured the place the tank will be sitting and it's just under 8 feet long so I think i'm going to go for the 7x2.5x2 (LxWxH) which works out at 260 gal (990 litres). This'll be a huge jump from my current 90 gal which has been the biggest tank i've ever had! Stocking wise i've not decided 100%, I like arowanas, gar, rays, flagtails and the large cichlids (jags, texas, midas etc) so I would have to see which of these would work together and how much I could fit in the tank without overstocking it. The tank is going to cost £438 ($745) plus £45 delivery which isn't too bad! I'll just have to find plans for a stand as this is going to be a heavy tank and i'd hate the stand to give way!