Handle Material
Burgendy Linen Micarta with dual steel liners and steel back spacer.
The burgendy micarta really glows an orangy/red in bright sunlight (beautiful) and the steel liners/back-spacer are for looks as much as strength.
Perhaps even exotic burled wood with the same steel work. Would make for a heck of a unique sprint run.
If the large blade is for hard use, then either black G-10 or canvas micarta.
Blade Pattern
Leaf (Military). IMHO looks and works best for larger blades. Spearpoint (to me) looks clunky on a large blade, and the clip-point is often seen on fighting blades.
Blade Grind.
Full Flat. No question.
Lock type
Compression lock would be my favourite, as slick as a liner lock, all the stregnths (and more) of a lock back.
Please NOT the ball lock. It's a really strong lock, but can be difficult to close in wet/cold weather, where a larger knife is more often used.