Hi Lkdog,
I own the Jag LFM, and would definitely reccomend bi-wiring. Although the improvement is not huge, it's a relatively inexpensive tweak. Especially if you're looking to upgrade speaker wire anyway. I also use the DH Labs wires and it's not much of a cost upgrade to go bi-wire.
Seems to add a lot of air to the top-end and deepens the soundstage. Again, not a massive improvement but noticeable.
Enjoy those Jags!!,
Karl