i was in the same situation, trying to decide between the JJ's, TST's and Jeffreys.
If you are going to be switch at all, don't go with the TST.
If you wanna make big GS like turns, go with the Jeffrey, JJ's turn radius is really short.
If you want float and maneuverability in the trees, go for the JJ.
If you want an all round ski with the best hardpack performance, go Jeffrey.
If you are never skiing switch and want a more traditional mount further back on the ski, go TST.