keeping a great white is next to impossible, they are oceanic fish, requires a large amount of oxygen. It would also consistantly bumping into the glass of your fish tank (just like a Sun fish). One Hella Big Tank Buster!
My favorite dream fish would be a Titan Trigger Fish
The entire GREAT BARRIER REEF with all inhabitants..
but more on the plosiable side...any thing i find that i like that would fit into my current set ups ...i cant get anymore tanks(per wife) as i have
a 200g, a 210g, 175g bow, 2- 29g(s) a 55g, a 75g, ..and empty tanks...20g 2- 10g(s) a 12g, 2 5g(s)