Considering buying an XLR

Hello to everyone, I've enjoyed viewing this site for the past few weeks. I'm considering buying an XLR, and I'd be interested in reading feedback and opinions about the car from current owners, if folks would be so kind to post some comments. I currently drive an '96 SL500, and will probably choose between a 2002 SL500 or an XLR.
Drove an 05 XLR this weekend. One impression that I had was how light the car felt. Of course, the Northstar sounds really great when you get into it , plenty of power, too. I thought the suspension was fantastic, perhaps the car's greatest and most noticeable driving characteristic. Some pretty rough railroad tracks, which most cars would have to crawl over, were soaked up with no fanfare by the XLR.
Does anyone use their car for long highway trips? (i.e. 500 miles+). I'll use the car for long highway trips for business, and I'm wondering how comforatble the car is for 8-10 hours. (A little hard to get a test drive like that.) One of the drawbacks to the SL is a comparatively (to the XLR) limited adjustment for the seat. Also, what about highway gas mileage? Does anyone average 26-27 highway?

I've noticed a lot of used XLRs on Autotrader with only a few hundred or a couple of thousand miles. That worries me somewhat. Are these cars that people disliked so much after such little use that they're willing to take the big depreciation hit? Any ideas.

Thanks in advance for your comments.