I ran Tokico springs and "blue" struts for a year until I fully understood how horrible they were.
Then went to AGX with the Tokico springs, The Hypercoil springs.
In winter I run the shocks at 2F 3R. Up until recently I run them in summer 3F 7R, right now I have them set at 2F 8R to get used to it for autocross.
The ride with the lower shock settings is firm Don't kid yourself. But you will get used to it, and it's not punnishingly firm. The Hypercoil springs are a LOT more confidence inspiring than any other off-the-shelf OEM style spring.
The drop is not significantly low. In fact, it doesn't even look lowered - it looks like where Nissan ~should~ have had the ride height set.
I spent quite a bit of time working out the suspension (I'm very skeptical and have to understand it, not go by what people say) here:
http://www.geocities.com/g_wellwood/...andstruts.html
Hope that helps.
G