Not bashing rcx either. I was going to get rcx, but held off because I wanted rear springs instead of spacers. I don't care for their shocks. Ran them on my jeep for a while and they were a little soft for my liking AND when the springs settled, I lost close to 1.5" of lift. This was on my jeep, but that's my experience. Though, my initial post to go Superlift made no mention of any negative feedback towards rcx. They are a decent lift for the $$. BUT, recently Superlift could be had for a price too good to pass up.
Superlift had a sale for the last 2 months with 20% off their already lowered price of $1300.00. They have 3" springs in the rear. It's just my preference to go springs over spacers. That and when I bought my 4" kit, it was $1079 delivered !!!!! Way cheaper then the best price I could find on rcx.
So for me, I saved a good amount of $$ and I got rear springs instead of spacers. It was a win win for me!