What, in your opinion, are the best coilovers, for the money, to put on a 99 Integra GS?

Ok you need to be more difinitive before you post. You are either talking about full blown coil-overs which include the entire strut assembly pillow ball mounts and springs, or you are talking about Lowering kits that include springs and adjustable sleeves which do not come with struts or anything else. Reply and maybe we will be able to answer your question.

Just the lowering kit, w/out struts and pillowmounts.

Ok good. You also need to consider what type of driving you are going to be doing, but ill assume that your car is a daily driver. Ground Control (Eibach) makes a very nice set of coilovers. They usually run about $300 for the set. Remember YOU GET WHAT YOU PAY FOR. There are several other brands such as Skunk2 (little bit stiffer springs) etc. that will work just fine. I would avoid anything that has an APC sticker on it.

I would also recommend that you also consider buying aftermarket struts/shocks along with the coil overs because you will eventually have to replace your stock struts/shocks anyways. The new shocks/struts would also give you a better quality ride and handling. If you do not replace stock shocks/struts you will eventually blow them 3-10 months down the road (depending on how hard you drive). Cheers

I would consider this to ultimately be a question between Ground Control and Skunk2 Coilovers, which are the most reputable names in the Coilover sleeve business. I'd personally recommend the Ground Controls, just from sheer word of mouth to their superiorty to Skunk2. However, I've ridden in both, and both are nice. I just like the overall setup of Ground Control, and the fact that Eibach produces them makes me gravitate more toward them as well.

How much would it cost for the coilovers w/shocks/struts/ and pillowball mounts.