Now that I have had my 09 SG for a couple of weeks and have ridden it every day, I would have to agree that the 09 is DEFINITELY worth the investment. It is a new machine all-around, and is better than I ever imagined it would be. It's AMAZING to ride and all the upgrades are VERY noticeable.
If you can swing it, it's worth the difference in price in my humble opinion.
The only negative thing is that due to the popularity of the SG's, I am under the impression that dealer's don't "deal" too much on these models. If you don't snatch one up, someone else will- and the dealers know that. There are LOTS of good deals out there on other models- especially now that the 09 model year is winding down (new ones come out in August, I believe), but not on the SG.
Good luck in whatever you decide!