straight from the FAQS:

Q: What is Caster? How much do I need?
A: Caster is the angle upon which your front axle sits at in order to help keep your Jeep driving straight. Positive caster, which is what you want, will cause your axle to sit in a way that your pinion shaft will be dipping ever so slightly towards the ground. Too little or even negative caster angle can cause your Jeep to wander and feel 'flighty' or 'darty' as I've heard some people call it. From the factory, your JK will have +4.2° of caster and if you lift it and install larger tires, you will need to increase this amount to help compensate for the modifications. At 3"-4" of lift, I have found that +6°~8° of caster will do wonders to help improve the handling of your Jeep JK Wrangler.

Just something to look at, I know my caster was low with my lift and tires( Like 2 degrees) and adjustable front lower control arms did wonders for me on the road.

 

I have a Jk and a BMW. I added ome nitros to my 4 inch and rides better than my BMW. Well I tend to think it does now! :-). Also, set psi to 28 and caster to 5.5-6 ( play around with it) and Walla!!!!!! I had had the same issue

 

Try the back seat angle mod. It makes it a lot more comfotable when its not straight up.

If its too noisy put some dynomat on the inner fenders and put in a roof insulation kit.

Rancho 9000s are a cheep adjustable shock. I just put a set on my jeep and WOW what a diference it made to the ride quality.

If that is too $$ the fold down the back seat and put in a air mattress for them to sleep on

 

so would you guys recomend the mx 6 shocks or the rancho 9000

 

also what is likely to give me the largest improvement the controle arms or the adjustable shocks?

what is a good brand for the arms - should i just stick with tera flex or are there cheaper just as good options

 

I heard good things about rancho. Had old school rancho on my Tj. I assume the 9k are pretty good.

 

I was just suggesting the MX-6's because they are an inexepensive adjustable. The ranchos are also an inexpensive adjustable. Both would be great for you. Talk to Northridge, or another retailer and see which one they can give you a better deal on. Both those shocks can be purchased for under $80 each if you shop around. I was quoted $82 by a retailer.

Be sure to tell them your current lift height so they get you the correct lengths.

Both the 9000XL and the MX-6 retail for right at $100 each.

 

what would you say is going to yield better results doing the shocks or the controle arms first

 

Both will impact driving. Shocks will take care of the bumps along with springs. Control arms will take care of your caster so control the "flighty feel" as they say. I have had teraflex and RC and both ate good. Never had RC arms but they make adjustable arms now and are cheaper. There are threads about reviews on the RC arms. Check those out as they are fairly new, less expensive and adjustable. I say they would be good but dont have experience with their arms. Teraflex makes great arms but cost more.

If cost is an issue get the RC front lowers and set caster. Get the rancho shocks although I havent tried either so just going off ppls opinions here.

I agree on the above post . Call northridge and ask him what he thinks too.

 

What size lift will you be running. That's the main thing here???