Shocks VS Coil overs

[Raider]

I'm wanting to update my suspension soon and been kicking around what to use. My initial plan was to use Bilstein B8 and H&R springs (or similar), but I see some alternatives that are about the same price. These are coil overs from Feal or KSPort and others. These are all ready to install and don't share parts from OEM. The Bilstein PSS9 are out of my comfort level on price as are the Ohlins and you would still need to complete them with the other bits.
These coil overs also will be similar i ride height drop as the B8 and I don't want to go any lower.
Any users of these products on here? Can you comment on them?
This is my DD and will see some track days 4-5 times a year.
I'm on stock size Micheline PS4S and its a 2002 S.

Thanks!