Option number 4 is most definately the best. All-Pro or Alcan. Longer than stock is the only way to go. It takes 2 minutes to weld on new hangers. Heck, it takes longer to remove the old hangers. If you are on a tight budget, go with the 63" chebbies. They flex great, just not as preferable because they are a little too long. Stock length springs suck, don't waste time on them. I know tons of people who got them the first time out and ended up replacing them down the road and wished they had gone the good route to begin with...