Bmw 525i 2004 or lexus IS 250 2006 or infinite G37 2007????

Lexus have the better reliability numbers..and since it seems repair costs seem to be an issue with you...maybe that is the way to go. I have a 2006 Lexus Rx400h, 2007 Mercedes Benz CLK550 , and a 2002 Porsche Boxster S. A new C-cl benz may do you fine as well, great little car.