Yes go with the sways. Stillen sways are under $300 free shipping from intensepower.com if you pay a little more you can get the botchkis sways and there adjustable. personaly i'd get the botchkis sways just in case :tup:

Benefits:

you wont burn a hole in your pocket, you'll get a good jump in performance (cornering), you will still have a majority of stock feel going over bumps. and you dont have to worry about getting struts to put on with your springs you got.

If you get springs, it will take a while but you will eventually need to get struts. within a year you should oder struts if you have lowering springs on your car, 1 1/2 max. you dont want a strut going out.

agree, sway is probably your 2nd best bet after r comps.

What exactly do you have on your car from the nismo? Did you just replace the springs and shocks?