My New 98 gsx build

[Halon]

I think you'd love a 5858 in a mitsu housing personally.

Head, I personally would keep it simple and affordable.
2G head, leave the head casting stock, or have them just clean up the casting in the ports a little, don't go too crazy.
Springs I'd just stick with a set of Crower springs/retainers as they are cheap and will allow you to rev to 8k as long as you don't run too ridiculous of cams. Cams, I'd think you'd be able to find a set of used HKS 272's for cheap. Proven since the early ages, and very affordable. Stock valves, 3g hla's, and you have yourself a pretty decent head setup on teh cheap.