[Sluggoslinger]

Personally, I feel like I made a huge mistake with the 550. I love the car but wish I had just done the m5.

I went with the 550 to keep a lower profile as I'm currently building a house and for a couple other reasons. I got the mod bug way worse than I intended to and it feels kind of dumb modding a car that isn't the best. i planned on doing wheels and maybe dinan stage 2, then i found this forum... and it was all over. I personally am not a believer in trying to "catch up" with a higher model but that is exactly what I'm ending up doing.

That being said, I do love my 550 and I will enjoy it until I get my M5 when the next model comes out in 5 years or so.

If the money isn't a big deal I'd go m5. If your looking at resale and your car as an investment, you've picked the wrong brand.