Hypothetically between these two cars which would you choose?

Mercedes
Exterior: http://www.gayot.com/images/auto/mercedes/c300_sport/top.jpg
Interior: http://www.drivearabia.com/news/wp-content/uploads/2007/07/2008-mercedes-benz-c63-amg-4.jpg

Infiniti
Interior: http://autoreview.belproject.com/media/1/20061019-2007-infiniti-g35-interior.jpg
Exterior:
http://i.i.com.com/cnwk.1d/sc/32121865-2-440-0.jpg

The Mercedes will have more luxury features and comfort but significantly less horsepower than the Infiniti G35. Styling is very similar, so that would depend on personal taste. Infiniti has much better reliability, although lower resale value. Maintenance costs will be higher for Mercedes, as well as insurance costs.

I'd go with the Infiniti. The C300 is nice but the G35 has more power and more room.