I had 2 of these on my grille guard (long range) and trust me... They are completely worth it if you do a lot of night driving, especially on back Ohio roads working 3rd shift like I do. They have saved my a$$ COUNTLESS times from hitting deer. Just imagine being on a long, flat, straight road and being able to see everything in front of you clearly for at least 300 yards. They are that good, and they were my first KCs, I will never buy cheap lights again.
Since you're getting 4, I would get 2 of the long range and 2 of the driving, aim the long range right in front, very slightly facing outward, and aim the driving lights off to the side just until their pattern touches the end of the long ranges' pattern. Even with the 2 long range, it was like driving in the afternoon sun.
I've also heard good things about Hella. Never owned any myself. They're around the same price.
If you're on a budget, look at the cheaper offroad lights on amazon and check out the reviews to find a decent pair.