I have had these sitting for 2 months and finally installed them 2 weeks ago. they ride great and are firm (no teeth chattering at all) at the settings I have them at (21 clicks front, 22 clicks rear, from soft to hard), but after more research and asking around I'm leaning towards pursuing Ohlins, or high end Bilstein (custom B12 or B16 kit).
The BC coilovers are 14k front, and 12k rear with the custom swift spring upgrade, and matched revalves for these spring rates. I have the instruction booklet and also the lowering tools that these came with. They handle great at high speeds well above the speed limit, and in my opinion these would be a great drift setup (I've taken the tail out a quite few times for fun, but I'm currently on a stock 2J so there is only so much I can do without a fully open track).
I paid $1,370 for this arrangement from the BC company in florida, I will take a $200 hit and let these go for $1,170 as this will put me one step closer to getting my Ohlins or Bilsteins.
Please feel free to ask questions, chime in here, or send me a PM.