I have 2 inch drop springs on my wagon, and 2 inch drop spindles. The front also has a 1 inch spacer to keep it from being too low. The springs will work better as a set, instead of springs and spindles. With the spindles, you get a slightly wider track in the front, and that could cause the tires to brush the wheelhouses.
If you are going with springs all around, either cut the tapered part off of the front bump stops, or use the Z08 bumpstops. To keep the camber correct, you will require about .030 shim removal (all shim stacks) for each 1/2 inch of spring drop (.120 for 2 inch drop). You also have to have your toe-in set. These are critical to get decent tire wear.
There are no spindles for the rear, only the front.
I like the wheels. Yes you need the 5 on 5 bolt pattern. You can go to 9 inches wide and have no problems. Maybe even 9.5 inches, but get your backspacing correct.