If i had that money to blow i would get either a huge 400 gallon custom made wall tank or a huge 400 gallon lake malawii chiclid tank!
Good luck with wat ever you do with the money!
I'd build a 5000 gallon tank, stock it with plants and native fish like bass, sunfish, perch, then I would put a school of like 1000 feeder minnows. Oh I'd also put a piece of driftwood the size of a large tree stump, with the trunk
I dont know the equvalent to american dollars but if i had that much money i would get a 500 gal tank and get 2 giant gouramis, several bala sharks, a school of silved dollars, and 5 full grown clown loaches. the tank would have alot of rocks and drift wood