My wife has a g20 330i xdrive and its a fun car. Its faster (obviously) off the line than my modified f22 m235i (n55). I have a dream of swapping a b48 into an e30.

It gets unbelievable mileage and has the power and torque needed to get moving when needed.

That being said, if you have the means of going b58, do it. Buy once cry once.