What brands do you guys recommend for suspension parts?

I started with Koni and now have Fortune coilovers. I liked the Fortune better. Both are pretty expensive so i would just get whatever works with your build budget and read alot of product reviews before buying.

What are you looking for? Struts/springs/coilovers? Sway bars? Control arms, ball joints, toe arms, etc?

Volk Metalcraft makes fantastic adjustible-everything control arms, subframes, and other suspension components.
RM seems to be the biggest name in sway bars I think? That's what I have but I haven't installed them yet. Whiteline is also available.
I'm a huge fan of my Flatout coilovers over the big names in budget coilovers like Tein and BC Racing, but the only one that you need to be sure to avoid is Megan.

I am looking for quality springs.