Keep your stock arms and drop brackets for now. If the Jeep drives straight and doesn't clunk, and you have enough space to run the tires that are on it, I'd leave it alone.
If you decide for whatever reason that you really must use adjustable arms, save your $$ and get the beefiest adjustable arms you can with rubber or poly bushings. Personally I'm not a believer in hard joints for suspension.
On drop brackets -
Ride quality and general suspension happiness depends, to a large part, on control arm angles. From the factory, the control arms pointed from 9 o'clock (frame side mount) to the center of the clock. Parallel to the ground. As you lift the Jeep, that 9 oclock mount becomes more like 11, and the control arm points steeper and steeper as you lift more and more. That angle directs more and more harshness into the body of the jeep.
Drop brackets lower that mount back down to 9, or closer anyway, and mellow out the jeep's road manners.
Adjustable arms are direct replacements for stock control arms, about 16" long if I recall.
Long arms are 30" or more and are also adjustable but require a whole new mounting system, and require you to get rid of drop brackets if you have them.
Hope this helps.