I'm currently building the LEGO 8169 Lamborghini Gallardo (which was a 40th birthday present in addition to me getting to drive one that day)! It's going to be a showpiece and won't be taken apart, so I am placing all the parts with the LEGO logo the same way. I hadn't read this discussion until today, so I am smiling that there are others out there doing the same as me. Cheers, all you OCD folks!
I've been reading through ebay today and have come across a couple of sets that are LEGO Certified Professional, but I can't find a listing for them here in Brickset. Is there a list of the sets like the LEGO Hilton Paris Opera Hotel or this Ricky the Rooster?