Or you can send me your 6 footer so I can setup your suggested tank from that same thread 
lots of people get a large tank then jump to large fish, but IMO i would love to do what you plan on doing, a large tank, lots of plants and amazing life in it, if it was me i would go for cardinals as they are amazing IMO
great respect for what you're doing, i would love to do the same.
No.Would it be wasted on 4 keyholes, 4 bolivian rams, cories and a massive shoal of tetra's?
Could do harlequin rasbora's, no trouble.
There will be plenty of pics aswell. Step by step.