Alot of hearsay floating around these pages!
I have had good luck with AIM and plan on buying the spindles how about you.You are the first person who has gave some info who actually has some of AIM's products.The rest gave opinions based on what I don't know.

 

I haven't installed the coil and a arm yet. I am debating wether to get the spindles instead. I don't off road and would really like the factory ride. They look to be of good quality. I used to have my truck lowered and was debating air bags, I checked with chasis tech and they have a good name and are very helpful. I might want to sell the coil and arm kit instead of sending it back, but I am going with aim for the spindle.

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1998 F150 STX 4.6L
Aim 3"/A-arm Lift. Rear Blocks
265/75R17Goodyear RTS
K+N filter charger
White Face Gauges
Leather "Harley" seats
Straight pipe exhaust

 

Why not both? The ride quality would suffer but I wouldn't say its bad I don't really notice a difference untill I hit uneven pavement or RR tracks