Thanks again to all of the forum members that have replied. Fred, I very much appreciate your input on the GM repairs.
I am in Pennsylvania and currently am enjoying the car for an extended test drive in our 'early spring' 70 degree weather and have asked the dealer for a print-out of the service history. I have also asked for the Certified Warranty and he is checking. This is a Buic k dealer in Central PA (Harrisburg), and as such says he is not authorized to give a Cadillac Certified Warranty, BUT his brother has a Cadillac dealership in another state and he is checking to see if he is able to process the extended warranty. I agree that this needs to be a better than normal deal based on everyone's input and am thinking of making an offer in the mid to high 30s (plus a good trade on my Jag), but ONLY with the extended warranty. The dealer has mentioned the GM Protection Plan, but I do not know how this compares with the Certified warranty.
So far the car has worked well (2 days and about 100 miles) with the top up and down numerous times. The only things I have noticed are a curb scratched rim and the original tires were replaced with Michelin Pilot Sport A/S. There does seem to be an unsettled or 'floaty/jiggly' feel over some road irregularties and I am wondering if this is part of the XLR suspension setup (PA roads are falling apart this time of year), the tires (35psi per onboard readout) or a possible problem. I have read about something like this in test reports on the XLR, but do not know if I am experiencing the same thing or a potential problem. I am currently driving a Jag XK8 with 18 inch tires and have had several Porsches in the past, so I know how I like car to feel, but have only limited experience with driving an XLR.