Porsche 911?
Audi S5?
Could you be tempted into a Ford Mustang?
911 is horrendously out of budget
S5 is too dated (can’t afford the new one)
Could be tempted by a Mustang, will have to see about driving one first.
Porsche 911?
Audi S5?
Could you be tempted into a Ford Mustang?

The C43 is a 440i rival so it's to be expected that it'll feel slow and relatively more sedate following an M4. Throw in 4wd that's great for launching but probably does nothing more than sap power and add weight on a rolling start and I'm not surprised it hasn't interested you all that much.
the C43 is a fantastic car and a great interior a nice place to be.
if the budget can stretch then the E63![]()

You heard it here first guys. A car that does 0-60 in between 4.1 and 4.5 seconds depending on spec is slow. Especially compared to a car that does it in 4.1...
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It probably does feel slow, most heavy 4wd cars do, regardless of actual pace.
In fact I’d suggest that many slower cars feel faster and more engaging.
Convertibles?
Not for me. Far to noisy.
He didn't say it felt slow, he said "it was very very slow".
As Nashe says, there's a difference between slow and sluggish.
As in outside noise coming in? If so then have you actually been in well insulated convertible? Whilst my M3 is old, the softtop is very well insulated to the point that if you blindfolded an average person and put them in then took off the blindfold during a ride they'd be none the wiser they were in a drop top... Unless of course BMW soft tops have changed in later models?
Interestingly, the 4C spider is actually quieter than the hardtop. The ridiculous amount of exhaust and road noise just reverberates around the coupe whereas in the spider some of it escapes through the roof! Pure refinement that is.