What's a good starter suspension system that can be upgraded later?

My car came with an awesome suspension set underneath. It's "stock" brand. Some poly bushings, a sway bar, some T-bars, and a reinforced K frame later, it's now the "rocks" brand.

Where are people buying the Aussie Poly offset upper bushings? I can make a set if need be, but sometimes it's easier just to buy 'em.