Before you buy one component from anyone, ask yourself, what is the car going to be used for. If it's one thing, focus on that. If it's a dual use or multiple use car, street/strip, street/road race, etc..., then know that whatever you do, it will be a compromise and you have to decide how much compromise you want. After you decided that, then you have to define your budget. Don't start down a road with a partial system that you can't complete. Have a realistic plan.
I have a system put together from multiple vendors but I wouldn't recommend it unless you plan on testing each change on a road course or drag strip. Each mistake you make gets expensive and I'm on my third front end setup.
Given that, here is my general rule of thumb based only on my experience, nobody else's. In addition, my goals are probably different than everyone else on this board other than 3-4 people. Given that, here is my suggestion for a multi-use street/strip/road race car that can be used as a daily driver and you have a budget of $1000. If your budget is more than that, just extend it appropriately.
First off, forget the concept of doing strip and road racing. At your budget level, the only option you have is adjustable shocks. Drag racing is whatever your car does when it gets there. Road racing or better handling street car requires a stiffer suspension with little rear-end squat. Drag-racing is the opposite. However, anything you do to keep the axle aligned will help drag racing. Other than that, focus on how much compromise you want to give up on the ride quality to get better handling on the road course or street. If you are primarily drag-racing, that suspension/shock set up won't work on a road course very well.
My suggestion on handling kits are stick with Steeda for a car that's 90% or more on the road and your budget is less than $1000. If you want the best handling and have a medium budget, my suggestion is a k-member, coil-overs, springs, new shocks (adjustable preferably, Koni's would be my preference but Tokicos are a good budget option), rear control arms, and new anti-sway bars, front and back. If I was doing all that, I would go Maximum. Stay away from D&D coilovers. Mu suggestion is for a $2000 suspension that spends 99% of it's time on the street. From there, you can get real serious with Maximum with Panhard Bars, Torque arms, etc...
One other thing, keep in mind how much horsepower you are putting out because that also affects the suspension.