Replace struts and springs without lowering

I have a 2004 530i. I have put 172,000 miles on the original suspension and needless to say, the ride quality is getting bouncy. I want to replace the suspension with something that is as close to factory as possible without getting raped by the dealer.

I have searched in this forum and all I find are threads about lowering, nothing about keeping a stock ride height. I would like to keep a stock height because I have 20x9 fronts and 20x10 rears and they fit perfectly.

Any suggestions? Your help is greatly appreciated.

I'd recommend that you check out the KONI FSD Shocks. KONI FSD adjusts damping automatically, so there is no need to manually adjust the shock absorber. These shocks replace OEM shocks and actively controls stiffness, and dramatically improves handling. The KONI FSD kit must be used with stock springs and it'll keep your ride height the same!