I like a nice BMW box...
But I'm not paying £32 for one !..that's really interesting tony and not at all a surprise..
just to add a slightly different perspective to the debate..
I trained as a Guitar maker and repairer when I left school and we had similar issues with Gibson, Fender,Guild, Gretsch and Rickenbacker guitars with OEM vs aftermarket ,often the parts manufacturer was the same for both with the exception of a logo, and when this was not the case, at anything but the lowest price points aftermarket was and still is the same or better quality than OEM....whilst the all OEM guitars will be worth considerablely more in monetary value in years to come (an all original pre CBS 60's fender strat can now go for £15,000 and a 59 les paul with PAF pick ups in good nick can go for £500,000.. and I have seen them go for more.. in perspective either one with aftermarket pick-ps and hardware might be half the value or less and it isn't half the guitar!..
I'm a pro player and have 20+ guitars to upkeep..I care about function and reliability over potential future resale value...so I suppose what i'm saying is you set your stall out based on what you intend to do with the thing, my 3 go to telecasters are not fender and don't have any fender parts!...and they play sound and feel great, although I admit they are at the "top end" of the market at £1500+ a piece.
my guitars I play and my car I drive often and hard on both counts so my main considerations are not about keeping it original but about keeping it working..however I have a feeling that an all OEM Z3 in 20 years may well be worth more than a modded one...in the meantime it will however cost you a bucket more to keep on the road if it's your daily drive.
my tuppence.