Here’s a quick summary of what’s new for the 2010 Infiniti Lineup:

• QX – Simplified exterior color selections. On sale May 2009.
• M – Revised option package selection and content, simplified color selections. On sale September 2009.
• EX – Revised option package selection and content, standard heated front seats (EX35 AWD), enhanced audio and navigation system features, and revised exterior/interior color combinations. On sale fall 2009.
• FX – Revised option package selection and content, standard Bluetooth® Hands-free Phone System (all models), enhanced audio and navigation features, simplified exterior/interior color combinations. On sale fall 2009.
• G Coupe – Revised interior colors and trim appearance, available next generation navigation system, new gauge color scheme and center console design, rain-sensing wipers and Advanced Climate Control System (ACCS) with Plasmacluster™ air purifier added to Technology Package, revised Journey model content and one new exterior color. On sale January 2010.
• G Sedan – New grille, front fascias (Base and Sport) and headlight treatments, new 17-inch wheels, revised interior colors and trim, available next generation navigation system, new gauge color scheme and center console design, rain-sensing wipers and Advanced Climate Control System (ACCS) with Plasmacluster™ air purifier added to Technology Package, standard 8-way power-adjustable passenger seat and one-touch auto up/down rear windows on Base model, revised Journey model content and two new exterior colors. On sale January 2010.
• G Convertible – The 2009 G37 Convertible went on sale in June 2009. Information on the 2010 model will be available at a later date.

Source: Nissannews.com

My Take: You could consider waiting for the 2010 models in order to get these upgrades (on the G37s), but you may very well have to wait until next year in order for the prices drop enough to get a good lease out of it. I would recommend jumping on the G37s now rather than later, when they’ll undoubtedly cost more.