On any control arm with a bushing, you don't need to remove them to make adjustments. The eccentric cam on the mounting point accomplishes this. Most arms that use rod ends that thread into the arm require you to remove the arm to thread them end in/out to set you alignment.
The thing I don't like about magnumforce's coil over sets is that they use the shock tower as a load point to support the entire nose of the car. These towers were never designe dto support that kind of load and over time, they will buckle the nose of your car to some extent, causing panel alignment and fitment problems. They have addressed this issue with one of their other versions, but the bracing supplied in that kit is the bes tlooking stuff. The Bill Reilly altekation kit is a much better thought out product, imo.
For black71's application, any of them will do. Talking to them each will give you some insight to their philosophy, if that is important to you. If you just want some arms, then any of them will do. Call who ever is closest, who ever is cheapest. Sorry, there just isn't a huge amount of difference in this part to really set all the vendors apart from each other. It is kind of like choosing an air cleaner. They all work the same, they just accomplish it with a slightly different design. It basically comes down to only a few variations, straight arms, curved arms, and rubber, poly, delrin, or rod ends. For a basic street application, straight arms with poly bushings are more than enough. Personally, I like to deal with Richard Ross at Firm Feel because he is a racer, his products are all developed through an engineering approach that are tested though racing, and he's supported the mopar community for decades. He also offers loads of other products that are applicable to performance handling while retaining the stock configuration and layout. Since most of my racing has been in highly restrictive stock style classes, his products allow me to adhere to the rules and look original while gaining performance.
