I have been using the JR 8450's for the last year now. I've been buying used ones for cheap and getting some great deals, since they are not the newest version. I was using analog servos before and noticed that they didn't have the accuracy of the JR. Now my analogs are all in my 8th scale, since the precision doesn't seem to matter as much.
Both servos would be good, but try the digital. If you don't like it switch back.