E34 or E39 6cyl is what you want. A v8 will be a maintenance nightmare by now. E39 has more electrical than E34. Cooling system maintenance is critical. 1 overheating can crack the head. About a $1500 repair. If that happens replace the timing chain guides too. Almost every known problem is documented online by now. Except the climate control actuators for fresh air. Those remain a mystery it seems. I've had BMWs for years. You need another car to fall back on or you will hate it and get rid of it.