Thank you for all the insightful responses.  Some clarifications; the CAT Challenger MT265B appears to be more similar to the MF 1533 than the 1531.  In light of that,  the CAT package is $1100 less!!!   In addition, the MF dealer has not been very responsive... for over a week I've been waiting for lease terms.  I e-mailed 'em Thursday as a reminder & called the owner today...no response.  As some of your mentioned, makes me question if I ever need service or support.
I'll keep you posted.
Also, the 16x16 tranny is the PowerShuttle on the CAT per their brochure specs.