You need RUCA's (Rear Upper Control Arms) for the rear that will adjust your negative camber problems... Also, you should get adjustable toe control rods at the same time.
When you manipulate the geometry of your camber, due to the contruction of the rear suspension, you will need to adjust the toe as well. When the car is so low, the factory adjustments are not enoughh to bring the toe back to correct.
In response to the front suspension issues, you have multiple issues to address... Extreme negative camber can be solved with adustable upper mounts on the top of your front suspension. You can control the specifc degree of adjustment like this... Toe is controlled with adjustable tie rods and the stress placed on the stock tie rods from being too low can be controlled with outer tie rod ends that extend up to relieve the stress on the steering rack.
There are multiple multiple comanies out there that do all of this stuff...
If you don't want to pay big money for coilovers, you can actualy get adjustable upper plates for the front suspension without buying the entire shock from companies like Tein.
As far as the hardcore control arms and adjustable parts, they can get pricey. Don't go with the cheap crap. It will make a lot of noise and possible break due to cheap welds. Do your research... There are many companies out there that offer different pricing... Look for sealed or coated solutions to parts that interact or move with another part...
Ask lots of questions, call around... It all depends what is in your price range. Kazama, Cusco, Tein are a few of the Japanese names that can provide solutions to your problems. Kazama and Cusco are expensive but I feel manufacture the highest quality product. American companies like SPL who use high quality parts are a good cheaper solution, but don't have the background or experience that some of the other tuners might have.
When I ask myself who I should buy parts from, I always look at who originated the part for the car and who developed the technology and who has THE MOST TO LOSE by selling inferior products...
Take your time, ask lots of questions, and ask yourself what your goal is with all of these products... What are you going to do with all this stuff once it is installed??? Does the benefit outweigh the cost?
Best prices so far have been from the lineup of people on the advertised MARKETPLACE links...
http://www.frsport.com has excellent pricing and they really know what they are talking about... They build cars first hand, know the products, know the tolerances, and won't B.S. you, BUT, they don't sell cheap stuff... Their prices are better than anyone on the items they carry, but they won't deal in cheaper parts because of the reasons I lister above...
Hope I was of help..
Cheers