If you're shocks are still original, you will end up having to buy a new set as old shocks will not like the lowering drop.
Eibach is a good brand but it's only a 1inch drop, which basically makes no difference in ride height on the car all other brands are 1.6inch and up, APEX is another brand that makes high quality springs, they're hard to find but if you do they're good. B+G are OK from what I hear, stay away from Suspension Techniques or Intrax though, they don't have the best reputation out there.
If price is no object, I'd go with the K-Sport Coilovers, around $900 or more for all 4.