I'm trying to stiffen my S13 up a bit.  It currently has KYB struts with RS*R springs.  Assuming they're "Down Springs" the rates are 212/168 lbs/in front/rear (3.8/3.0 kg).  I'm looking at a set of TEIN S-tech springs for $40 on ebay, and their rates are 207/179 lbs (3.7/3.2 kg).  And on Craigslist, I'm looking at a set of KYBs with Tein camber plates and Tanabe GF210 springs, with rates of 2.9/2.7 kg (they don't list lbs).  

I can't honestly believe the RS*Rs are anywhere near that, I can compress them with my fingers.  The car sits nearly bottomed out and I'm sick of it.  The car understeers, bottoms out, and just plain sucks.  I don't have the money for coilovers, so I have to make due with springs for now.  Which should I go with?  My 4th option would be to scrounge or splurge on Ground Control coilovers, but I can't seem to find them used (which means Id have to save for a while).  I'd prefer the TEINs simply because of the price.  I may also do the Frankenmiata trick of adding super long and squishy bumpstops for extra spring rate.  I'm thinking maybe mix the RS*R fronts with the TEIN rears to get the rear end to be more lively.  Thoughts?

Oh and finally, what's your guys opinion of Godspeed?  Are they good parts?  Looking at their sway bar/ control arm kit as an option for suspension bits while on a college/minimum wage budget.  As always, a big thanks in advance for the help.

The Teins were used that's why they were so cheap.  Either my springs are fake or they're damaged because the car sits almost on the bumpstops, and the only weight I added was a rollbar where the backseat use to be (and those pretty much cancel each other out).  I've got my money on fake.