Just to clear a few things up:
The 2008+ CTS was brought to the market with an extremely low margin for the Dealers in an attempt to guarantee the car's success. I think everyone at GM knew they were sitting on a winner, and they wanted to be sure that the magazines and the public would be stunned at the price point for such a nice car. Over the last 12 months, the MSRP has slowly increased by approximately $2,500, part to give Dealers a little more margin and partly due to rising costs of steel, copper and other materials.
As far as cost comparisons to the first generation V6 CTS, keep in mind that even though the CTS is a lot nicer than Gen.1, there's not a lot of more expensive items on it- a lot of styling changes that improved the car, but not much to raise the cost. The 2008s don't have paddle shifters, still have cast iron rotors, the same wheel sizes, 235 tires, a Naturally Aspirated 3.6L engine, etc, etc. The V model is going to have a bunch of items that cost quite a bit more than the equipment on the Gen.1 V, such as the two piece rotors, larger and wider wheels, wider tires, larger engine, Supercharger, intercooler, extra pulleys, magnetic ride control, Alcantara steering wheel, etc.... I know it seems like an easy comparison to make, but there's a little more to it.
Also keep in mind that a Gen.1 V6 CTS could barely get up to $45k, even loaded. A gen.1 V with FG2 and a roof was $55k ($10k difference for those keeping score at home). It's now possible to get a V6 CTS up to around $54k, so a $10k difference would put the V at $64k base. If they pull that off with the added cost of all the things mentioned above, it's a hell of a deal.