I was looking to trade my 2012 550 s4 for a 825i s4. I thought the 550 s4 was long but the 825i s4 is 10 inches longer and over 500lbs heavier. I can get one with turn signals and running lights for just under $18,000.00. I'd need to add another $1000 to add the winch and windshield. That's $8000.00 more than I paid for my 550 s4. The bed is steel and being so close to the beach I'm not sure how it would hold up. I like my 550 even though I've had my problems with it. Is the 825i s4 worth it or should I see if the 850i comes out with an s4.