Ugh I don't know... that's a tough one. We bought a 2008 (before they released the 2009 specs) and while I do think the extra 10lbs plus the other features are cool (we bought ours at $549 too) I'm not sure they are worth the extra $120 for *US*.
Here's why (and yes, I'm saying this to reassure myself that the 2008 was the best choice and that I can't go back now, LoL)...
The extra 10 lbs sounds good but I honestly intended to only use this as a toddler stroller anyways on a day to day basis and then only at the mall after that (love that big basket). I still
Macs and intend to use those once my child is bigger (walking and such). I also don't know honestly that I'll keep this stroller once a second LO is on the way, it would depend on how old this one will be, so we may never even get near outgrowing the stroller if we go to a double. (Does that make sense?)
The cell phone pocket is a cool feature I suppose but the large basket already has pockets on the back. Also, I tend to just have my cell phone ON me versus in my bag. I also haven't played with the 2009 models but I couldn't find a position on my 2008 that I couldn't access the basket, so saying it's easier to access may be true, but I don't have problems now.
The new fabrics and what they are made out of are a neat feature and if your concerned about what fabrics are made out of that would be fantastic. And maybe I'm a bad soon to be mom but *I'm* really not that concerned if my baby has un-dyed organic soy and cotton lining in the bassinet when we have dyed regular cotton sheets on our own bed
Also, I don't like the new color choices. That alone puts me off of the 2009 models and honestly would be why I wouldn't buy one, no matter what the other features were... plus, the blue is now a weird color that reminds me of these puffy vests we sold two years ago at my work. I prefer the old blue on the 2008 models.
Not sure how helpful that is, but trust me, after MONTHS of obsessing not only what stroller to get but then what color to get I understand the issues of "committing" to a stroller! (We also looked at the Kolcraft Contors 4-wheeler too btw but I hated the color choices in the end so it went off the list... yes, I'm that petty about colors
).