If you wan't hassle free and even lesser electronics to deal with, the 328i is good and its a square engine (84x84). There's torque across all the rev range, only problem is the intake manifold is somehow very restrictive, hence lower its peak HP. Other than that, almost everything else is alright.You know me well... hahaha... and roadtax isn't a problem la. The max I'll go is 3.0 but if I have a choice I won't go there.
Thanks,
Ken