I have the same car as you and wanted to achieve the same as you. Last summer I went with Koni Yellows and kept the stock springs. It gave me exactly what I wanted, stock height with improved handling. It's only a bit more bumpy but well worth it. I feel more confidence in the stability of the car. I also added an m3 rear sway and Powerflex rear subframe bushings to top it off. I'm very happy with the new set up.
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'10 AW E90 335i X-DRIVE M-SPORT
AFE DCI | UR DPs | BMW PE | ALPINA B3 TRANS FLASH | 10MM FRONT,12MM REAR ECS SPACERS | M3 REAR SWAY BAR | POWERFLEX REAR SUBFRAME BUSHINGS | KONI YELLOWS
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