H&R springs price ?

[BMW Lunatic]

Gents - what's the cost of néw h and r springs to lower the x5 for a good stance ?

Cost of product ?
How much to install ?

Before I go to my local Bmw mod guy for pricing .

Also lowering does it affect ride quality?

Thinking of Making this happen on a 2015 x5 50 Msport with 48 miles .

Thanks in advance ,
Lunatic