RE: Noob needs help trimming plane Please.
The 380 and prop in the pictures in the link you posted certainly look the same as a standard Speed 400, so I'm guessing any of them would be fine. Worst case, Hobby Lobby has prop adapters.
What is the rating on your ESC? It's actually the battery pack, or voltage of the pack, that drives the amps being drawn, so if you stick with your existing packs that shouldn't be an issue. Most Speed 400 (380) applications are about 12 to 14 amps maximum.
Dennis-