What price range am I looking at to have a decent suspension kit installed? Something for day-to-day driving, but want to lower the ride height around 1.5-2 inches.

I have a 2000 Integra LS

Maybe something from H&R or Tein...

If from Tein then about $1000. If H&R abut $800 or so for the Cup Kit and $1200+ for the full coilover system. Otherwise, about $800 or so for a set of good lowering springs and Koni Yellow shocks (the only good shocks to get). A little less $$$ than that if you go KYB's.

I paid a little over $500 for Neuspeed Racing Springs, and KYB AGX 4-way adjustable shocks... off of ebay
also check shox.com, I am also a satisfied costumer from them.