But OP, I think you'll like the DP.
Maybe more importantly, you KNOW you're always going to wonder if it's for you or not. And it's cheap enough, with good resale.
Go for it, for sure.
You can always recoup most of the price if you decide it's a bit too much.
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'02 S54 M3 (500/500 GC/Koni)
'08 N54 135 (JB4, DCI, BMW PS/Bilstein B6s, H&R M3 FSB, Strongflex FCABs)
'14 N55 X1 (JB4, BMS DP, BMS Intake, Alpina TCU reflash, H&R Sports, Bilstein B6s, E93 M3 RSB, Strongflex FCABs, baby seat)
'08 N54 535xi touring (Bilstein B6s, Downpipes, MHD tune, baby seat)