I also use a jacobs (drill chuck). as long as it is a spindle shape. I bought a small mini nova chuck for other small mountings, such as small bowls etc. It was fine too.
I'm thinking about selling it as I don't really use it any longer.
If you already have a drill chuck and it's just spindle stuff you're turning, try it first. A drill chuck comes in handy for other things besides, so it is not a bad investment.