If you've got the extra scratch, go for a full leaf pack.
I ran a Rusty's AAL on my stock (1992) springs for about five years, and they were okay but when the AAL's finally lost their arch the whole spring pack went flat as a pancake.
On it's final wheeling trip with the AAL's, my buddies said that they thought my spring packs were actually arching the OTHER way a couple of times!
As long as your stock springs still have good arch to them, they AAL's are a decent temporary solution...but the key word there is "temporary". Eventually, you will be spending money on a full spring pack.