S55's are awesome cars, but I'd say that it mostly depends on your financial situation. I have an E63, my front brakes had to be replaced under warranty, it was $2800. 900 dollars for each three piece rotor. The S55 is a beautiful car, but you need to buy an extended warranty and you need to be prepared for replacement parts to cost two to three times what they cost in a Toyota, and three to four times what they cost on a GM product. Trannies are bulletproof yet expensive, but engine parts are expensive and it is the niggling electronic parts that will kill you one repair at a time. I'd budget 3k a year for repairs if you are driving 12-15k per year. I'm not saying it will cost 3k per year, I'm just saying that some years it will cost you 1k, and some 5 or 6k if you have a couple of failures in a row. These cars are sophisticated as hell, and what sometimes happens is you have a number of small things break, and if you don't keep up with them you begin to kill the resale value. But if you budget for it and are covered for things like catastrophic engine failure by a strong warranty, I'd go for it. It's a whole lotta car, and if you love the experience of driving it, only you can put a price on what that is worth. Oh yeah, and make sure you have a competent mechanic, because the dealer will crush you in terms of cost once you are out of warranty.