I did the diff drop from DOR about 8 months ago. Overall I am pleased with the results. The bracket was of very good quality and Joe of DOR was very helpful. But take into consideration he makes these to order so you will probably have to wait awhile to get it. (I waited about 5 weeks I believe).
I'm sitting about 3"-3.5" taller and the drop really sets the front axles straight, gives me much more confidence in the inherently weak front drivetrain when wheeling.
However... If you decide to do the drop, you must either have someone or someplace put the brackets on for you or you must be mechanically inclined and well tooled. They are a PITA to get on and off. You'll need to undo cv joints, ball joints, get an alignment and wrestle with 4 monstrous bolts (I ended up stripping/cutting/replacing three of them) So seriously think about how much you'll benefit from this.
And ldub is right, you do need to lower the front crossmember with this mod, I used spacers but DOR sells a modified crossmember as well.

In summary, If you want to wheel hard, then go for it. And take the oppurtunity to rebuild the CV's, Replace tie rods, change the diff oil, replace/flip/spacer ball joints and maybe even upgrade the brakes while you're in there like I did.

Also, I'd be willing to walk you through it, and I think SPAZZ, AlaskaVX, and Coachreed (if he's still around) all have experience with this and are willing to help.

Bobmumgaard