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Both the most recent and previous gen CTS-V wagons are absolute monsters. They're not just blunt tools but incredibly capable. The most recent model with the LT4 engine, magnaride, and ZF 8 speed is without a doubt, one of the best estate purchases you can make.
They were made in limited numbers though and hold their value well, they're still around $55k used in the USA, when they do come up for sale.
If you really wanted one, then I'm sure Craig at Dyno Torque could help you get one.
I would have thought that you would have been more familiar with fast estates than most of this parish.
My suggestion would be a Cadillac CTS-V - probably a bit of blunt object compared to anything European but they sound great and would be pretty rare in the UK. LHD so perfect for trips to the continent.
https://www.youtube.com/watch?v=ydTFISfwpRo