Don't get both boards, too much duplication. Roger is the expert here and I have seen him work with beginners and intermediates on many occasions. I would put a lot of trust in what he says.
There is no perfect answer here, just feedback from a broad range of experiences, so you have to consider that we all have our biases.
Ocean use is a double edged venue. Open water or bay cruising, or surf sailing?
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.