Advice on what to get?

Hi,
I'm an occasional lurker to the alt/rec.aquaria.* world.

I've had 2 tanks for around a decade now (sheesh time flies). My
goldfish were in a 140 ltr corner tank (stands about 3.5 foot high)
which had an undergravel filter (spit). We moved, the filter must've
got stirred up then I got sudden death syndrome - which was partly my
fault for not taking their illness seriously enough straight away :-(

It's a couple of months now so I'm over the grief ;-)
I was thinking of getting Cichlid's in the tank and need some advice.
The main thing is we live in a rented house and so having fish that
are relatively easy to move is a must (as we may have to move each
year). The G/F were fine I could just put them in a bucket and they'd
be ok. My tropical tank has always been easy too.

Tank - I'm going to restart it with two external filters so it will be
quite heavily filtered.

Plants - None. The height of the tank and the lid construction means
using an energy efficient bulb for light - this doesn't allow plant
growth.

Decorations - I am tempted by going for wooden branches up the back to
create a sort of Mangrove tree-root effect. Other than that it will
be rocks (or rock imitations).

Fish - One of

African Cichlid Tank

1 trio Labidochromis
1 trio Cynotilapia
1 trio Copadichromis
6 Dwarf Rainbowfish
2 Dwarf Plecs

or
South American Cichlid Tank

2 or 3 Discus
2 Plec or Catfish

or
Oscars Tank

1 or 2 Tiger Oscars
1 or 2 large Catfish / Plecs
However my fiancee went off the Oscars when I told her they liked live
food! Besides they will outgrow the width of the tank in 18months to
2 years.

or
None of the Above ;-)

Cheers, Dave.