I love my Infiniti M45, it's got about 40k miles on it, but its not very fuel efficient. WIth gas prices likely to hit at least 5 dollars this summer, I'm thinking of trading it in for a used Camry Hybrid. Is there anything I should know about the Camry Hybrid, or hybrids in general about their long-term sustainability. I'm thinking of hidden costs related to batteries and other unique equipment on hybrids.