One Fish Two Fish

Growing up, I had my share of goldfish - they were so cheap (some were won at school carnivals - those were the days!), and low maintenance.  Most of the work besides the regular feeding seemed to be keeping the tank clean.  Now that I'm older, my interest in pet fish has waned, but every so often, things like this cause me to want to have a fish again, if only because it would look so cool in the house:

The Aruliden Fishscape Fish Bowl - $140 of fish-bowl-awesomeness.  Biggest things going against it: price, and... how difficult would it be to keep this clean?  Any pile-up of fish poop or algae on the side would totally ruin the beauty of the tank.  Despite this, how cool would this be with a tetra fish?  And colored pebbles or glass rocks/marbles on the bottom?  A girl can dream...

This totally inspired me to look into other fish tanks available - here are a few that stood out to me - they look interesting/unique, and don't take up much space.  What do you think?

Umbra FishHotel Aquarium - they can be stacked!

Planter and fish tank in one!

biOrb Aquarium Kit with Light Fixture -- $69.99 (Amazon)

A self-filtering aquarium