which should i get..... advantages or disadvantages of either?

by the way, i have an 07 fx4

 

I've been contemplating this one also. I am thinking I should just go with the Billstens cause my truck already has 61000 and the OEM shocks are shot. A spacer is only $90, and if you dont like it you can resell it very easily

 

I'm going to a bigger lift and have a set of bilstiens I won't be using. They only have 9000 miles on them. Already pulled them off to get started on the new setup, if anyones interested. They are the new bilstiens with both the 1" and 2" as well as stock height slots. Call me @ 978-815-5111 if your interested.

 

I've done both...first the AS, then the Bisteins. 2" is not always 2". The 2" AS lifted the front up more than the Bilsteins. I was a bit peeved after swapping them out, but the ride quality of the Bilsteins made up for the slight difference in stance. Not sure where the spacers are at the moment but they were pretty hideous looking after being on for about a year.