Put in a higher deposit for PCP?

[Usy777]

Looking to buy my next car (ideally a 2018ish f80 m3) on pcp and I am tempted to put in around 7 or 8k as a deposit, I can afford it but is it a reasonable amount for a deposit? The car itself is a competition pack in yes marina blue with only 13k on the clock.

I have previously had a lease car a35 amg in which I put down 4k initial rental, I didn't think much of it but I know some people may think it's a bit too much for a lease.

Anyway just want to know if anyone had any advice on if it's a good idea to pay a high amount for a deposit or deal with higher monthly payments?

Let me know your thoughts!