The time to own big, thirsty, luxurious V8/10/12 cars is now.

The Volvo is at a point where I'm happy with it, it could do with more power but the rods will be on their limit at the next stage, so I'm thinking of selling up and getting something bigger and comfiererer, so I've been scouring the usual spots and there's plenty of 540/740/750's, S8's, S500/Cl500/E55's for sale in budget range.
The Mercs have been taking my eye mainly, especially S500's and CL500's, have any of you had experience with the above? Opinions? We had a CLS320 a couple of years back and it was a lovely place to sit.

I know it's still a 100 grand car at the end of the day and service costs will be eye watering, but you only live once!