Same with my Bagger Brace-equipped '07 Road Glide. There are other things that changed as well, like the Brembo brakes and six-gallon tank in '08 and the quiet 5th gear in '10. I enjoyed all 33k miles I put on the '07, and if the Road Glide Ultra had not appeared in the lineup this year I would have kept it - but a 10 mile test ride of the RGU was enough to close the deal. If you are set on a pre-'09, make sure you don't ride any newer ones. Unless the budget simply can't handle it, I wouldn't look at pre-'09, and would prefer a '10 or '11.
I've been busy the last three weeks, but have managed to put 1800 miles on the RGU over the same roads I've ridden many times on the '07, and the '10 is a much better bike in all respects. The 103 is just a bonus - the ride, the handling, and the braking are worth the cost. The MoCo was even kind enough to eliminate the decision on the 103 and the ABS - they, along with security, are standard equipment on the RGU.
Another thing to consider is market value of the particular model you want. Some models seem to hold their value so well as to make it seem silly to consider a used one over a new. Add in the additional interest (if financing) on used, and it gets even closer. Kelley Blue Book on a 2008 Street Glide gives a retail of $18,110 and MSRP on a 2011 starts at $18,999 + freight and fees!