Definitely agree with the TARDIS being the fastest, I mean, it's a time machine, you can be at your destination before you left! But the Heart of Gold does not travel instantaneously, I mean it does once you turn on the improbability drive, but that apparently takes some doing and contributes to longer trips, as per the book. As far as the Battlestar Galactica, it may make instantaneous jumps as well, but the calculations for jumps can take days, as shown often in the series, and all sorts of stuff must be done before and after any jump, as evidenced by the constant pressure to get another jump set up before the Cylons arrive.