That's definitely still a solid setup, but I we've released our handling springs since that post was made, and I would suggest those instead of the P springs. You can check them out here:
http://bmrsuspension.com/index.cfm?page=products&vehicleid=1&maincatid=21&catid=69&productid=1462
And if you have any questions about them, you know where to find us!
I've been running this setup but with the handling springs. I have been happy with everything up until making the switch to 285/35 RE11 tires. Now the shocks aren't up to the task (nor are they designed to be).
I would definitely recommend going with the shortened Bilstein shocks designed for lowering springs over the koni yellows. I'm having to run the yellows quite stiff now to keep up with the tires, and it's a bit harsh.
Everything else has been performing great