Thats good to know. I don't follow most manufacturers as closely as I do Nissan. I have both a Nissan and a Toyota. I have no complaints about either. The Toyota is a 97 Corolla and the Nissan is a 96 Maxima. The VQ is a marevellous engine and has a reputation for being bullet-proof. The 7AFE 1.8L engine in the Corolla has been wonderful as well.
Belt replacement is a relatively minor issue IMHO - my local Toyota dealer does it for $199 and given that the Corolla is driven lightly, that amounts to a 6-7yr replacement interval for me - so it's not a concern whatsoever.
Back to the topic on hand - at the end of the day, the slight decrease in ratings via the new SAE measurement is hardly anything to get overly concerned about. IMHO HP numbers should be one of the lesser factors considered when comparing two competing vehicles, e.g. Accord vs. Camry vs Altima (just an example). The exception is when you are comparing what are supposed to be "performance vehicles" and the HP one of the most important selling points (e.g. the whole Mustang HP rating fiasco).
Just my 2 cents ;)
Nirav