the turbo arrow is basically a 1 engine seneca. (dont buy one though - its ok, but there are nicer, more modern a/c available now with modern engines and all the trimmings). the arrow will carry fewer people but at the same speed. Depends how much load you want to take.
Also depends whether you want to fly in IMC. Its a personal choice, but i'm not a fan of this in a single engined plane.