Rodders,
Sorry to drag your thread a bit off topic. To comment on the designs you mention -
Marabu (1970) Interesting design but, as Evan said, quite an involved construction job. Needs retracts to look correct.
Skyliner(1964) A bit of a barge. Too old school for me and rather ugly. Not my cup of tea. No real contest pedigree.
Styx (1969) Unusual shoulder wing layout for something a bit different..... but it's French
Spitpanser(1969) One of my favourite designers, I like all Rich Brand's models. His Tigerpanser is also worth considering.
Equaliser(1969) From the ballistic model era. Too small and fast for me. If I wanted this type of model I would build a Twister.
Having said all that, the design I would choose would be a Superstar. I had a couple years ago and it is one of the best flying models of it's era. Mr Matt developed it over several years so it would be authentic with or without retracts. Mine were Mk1s with fixed gear.
Just my opinion - feel free to differ.
Ray