it looks very similar to the aquac ev series. i would mod that design a little to make it a beckett (better air injection than venturi from what ive heard )
i thought about making a fake sand bed but cant be bothered making something that looks crappy i highly doubt my creative ability.
i dont mind the BB look i prefer it to allthe hidden nasties that i cant see
very few people on this site are going to try and sell you something for personal benefit. you need to decide wether your willing to invest the $$$ in decent equiptment and have a good shot at it. the skimmer i suggested from ben would be the smallest id consider for a tank that size
see this link
http://www.deepblueaquarium.co.nz/skimmers.htm
you might want to find a second hand deltec
not on a tank that big, ben (deepblueaquarium) has some needle wheel skimmers that are ok. not the best in the world but they dont cost the earth like deltec