Have owned a Titan, 2 Sentras, and a Maxima. I recently bought a 3 year old Infiniti G37x coupe. Wife and I absolutely love it. Traded in our 2 year old VW Touareg which started to have electrical problems. Would love to have an Audi S5 in the future, but will only lease, not buy.
Easy decision if you're buying used: Infiniti.