@julian That seems most logical keybinding to me. Else maybe Shift-Enter if Ctrl-Enter conflicts with some DE or other.
Aye, and therein lies the rub: With so many different WM's and DE's these days might be a challenge to find a binding not already in use somewhere. On related note, best also check major browser vendor keybindings.
That said, I am not aware of anything that would conflict with Ctrl-Enter.