You can also do a search over at JU.... when I was looking to get springs for my YJ, I searched high and low for what people thought was the best.
As for what brand... everything I read said BDS, and I have loved mine since day one.
BDS Site:
I have installed a few YJ lifts, and I will tell you. They are all the same. The hardware is basic, and the nuts and bolts are all just regular stuff. So then if they are all the same, which lift do you go with? You need to base it on 2 things.
Springs,
Warranty.
That is why I went BDS, they have a great double military wrap spring, and the best warranty out there... No fine print, cover all.
This unique warranty proves our commitment to the quality and reliability of every product we make.
If you are the original purchaser of any BDS product and it breaks, we will give you a new part. Period.
Rubicon express also has a great spring, but the warranty is nothing, and the customer service can be a pain depending on which day you catch them.
All other are OK, but usually you will read that the are a rougher ride. Like Superlift, ok lift, but rides harder than most other brands so that can really suck when you are trying to save your kidneys.
By the way, the best brand is Alcon Springs, but they cost $$$ so within a budget, go BDS or RE.
AS for where to buy, there is a place here in CT, or you can email BDS. The place in CT is good, however I forget their name, XJMark or Ron should know. (Driving Image???)
Lastly, if you want a few tricks of the trade when it comes to YJ, feel free to get a hold of me... I have a few things that will help you out along the way.
(example, if they let you, order the kit without BDS shocks,
Doetsch Tech shocks are cheaper and softer riding, and even though the BDS kit will say 3.5, it will give you 4"+.)
