don't waste your money buying anything with the jebo odysee name on it. if you can afford it and have the room a sump / fuge would be the best choice (IMO) for filtration. you can also do a wet dry or a canister. you have to watch canisters though cause they can trap nitrates.
as far as how much live rock and live sand for a 55 gal. i have 60 lbs of live sand and 100 lbs of live rock in my 55 gal.