Hmmm I'm about to breakup with 2006 Lexus IS250 after a solid 4-5 years with her but some of the options I've considered include:
2011+ NIssan 370z $40K+
2006 Porsche Cayamn 987 $60k
Infiniti Q50 $60k
2009 BMW Z4 35i 65k+
Possibly wait it out and save for the 2015 Lexus RCF which would be priced at 110k+