TA DAA!!!
well first off...where did ya find teh BCs, I just discovered them recently while searching for my accord.
in any case. The BCs have a good reputation with the accord people. they are above ksport and D2 but under Tein. I know of no one who has the BCs, your the first person ive ever seen mention them before, so how low...not sure. but i'm sure a call or email to them will answer that.
Ksport and D2 are practically the same thing. same company. they both have a low drop...lower then you can drive on. so thats not an issue. The issue is with their quality, they offer awesome features for a bargin C/O. Pillow ball, camber plates, shock and ridehight adjustment...everything you need. with either brand you can have all of this for under $1K. but i will warn ya, the quality of D2 and k-sport (kontrol pros) is not the best. the ride is harsh and not easily soffened unless you get lower spring rates...which screws up the valving. personally, id chance it with the BCs or get the next grade up of K-sports, GT-pros...i think.
to be fair, my k-sports were used, but even having being recently rebuilt...they had issues.