W221 now for under 40,000€ !

So I know now that I’m going to buy the current W221 this year! Now S350 is already available for well under 40,000€. S500 already for just over 40,000€ and under 100,000€! What do you think it’s recommended to buy one of the first ones? Are there bigger problems with the W221 series? The S350 is too weak for me on the chest, which I had to “test” by my friend for 3 days. Has anyone ever driven the S450? Is he with my S500 from the Or is the S500 the optimal engine of the S-Class again? Greetings