im using aquariums ltd for a 150 (5x2x2) with sump, weir, all plumbing, 3 holes, black backing, opti-white front pane, no hood and base for £850.
its not quite on the scale your wanting but they were great with me, their guys even bring it into the house and they were going to make provisions for extra help because im disabled if it was larger than a 6x2x2 i wanted.
i feel like i got a very personal service from them. could be worth giving them a ring.
i phoned ndaquatics and they wanted to charge me for a marine setup because i wanted a sump. they were quite unhelpful and they seemed like they didnt care so i took my money elsewhere. they also told me the delivery guys just dump it on the drive on a pallet and leave, disabled or not.
ask for james 01794515923 he very helpful he said hes doing it at cost plus 10 percent which i belive him good price for tank size my seabray is very nice but i think a buyers market at the mo the place they use is recomended by clear seal he can get some unsal cichlids, pike ,and aaa flower horns say that dave past no .on cheers..