I think we all have beaten this topic to death already.

There are lots of choices with vehicle purchases- New Vs Used? Warranty VS None? Own vs Lease? DIY vs $$$ and on and on. Everyonegets to make choices. Most on this forum tend to make SMART choices by DIY to reduce cost of ownership and to improve reliability on 10+ year old performance SAV.
If you plan it right most of these vehicles will go way passed 150,000/15 years and still look good and get remarks that start with "Is that New?"
DIY, learn from the forum = happy owners
Give your repair shop of choice $$$ (Dealer add 40%)when something happens will usually make you great friend of the shop owners, but not much else.

DIY and drive until there is nothing left. That will be ROI.

__________________

2005 X5 4.8IS
The Blue ones are always FASTER....

Current Garage:
2005 X5 4.8is
2002 M5 TiSilver
2003 525iT
1998 528i
Former Garage Stable Highlights
2004 325XiT Sport
1973 De Tomaso Pantera, L Model
1970 Dodge Challenger T/A 4 sp Alpine White
1970 Dodge Challenger T/A 4 sp GoManGo Green
1971 Dart Sport, “Dart Light” package
1969 Road Runner 383
1968 Ply Barracuda 340S FB Sea-foam Green