OMG, dude, you have got to be kidding me.Sweet because I plan on purchasing a 2000 zx2 quite shortly and why should I go and spend $400 on a set of ground control coilovers when I can get R-1's for like $80...
The difference between R1 and GC is NIGHT and DAY. Going out and spending the least amount of money you can is a BAD move (a riceboy move, actually), because you'll get what you pay for in the end...do yourself a favour and LEARN about the stuff you want to buy before you do it.
Being a longtime ZX2 owner, I speak from experience...your best bet is to run springs and struts, like Eibach/Tokico...that is the most durable setup...you won't be replacing struts every 1000 miles or so like you would with cheap-ass coilovers like the ones you mentioned. The ZX2 does not currently have (or will probably ever have) an adjustable strut available either (recommended for coilover use).
My 2 cents.[/quote]