We had an E46 with FIVE power window failures. When dad sold it, he was at the point where he was afraid to roll down the windows. It had other issues as well.
My E91 has not been all that reliable either, sadly. Lots of electrical issues and then a big mechanical problem (gas tank cracked).
What turbo problems are you talking about? Other than the HPFP issues, I've not read of any turbo issues.
2009 E91 Montego Blue w/ Gray Dakota 6AT ZPP/Logic7/Sirius/Idrive/Butt warmers/6FL/PCD/CA/6NL/Xenons