I have a SJ781 MHX, 5S66MLF(extended to 6'8), and the UMBX S700L. I've tried them all for smaller trebled baits for smallies and by far the SJ781 is my favorite.
My second choice would be the UMBX S700L, I had 2 of these, the first one that I broke had a slightly lighter tip and worked much better for these baits than the second one. Thats when I moved to the MHX SJ model.