Personally I'd echo this. I wouldn't risk a cheap contact patch of rubber in any car, let alone a one with reasonable performance. Plenty of videos on YT showing differences in breaking distances etc with cheaper tyres. I understand where your salesman's recommendation is coming from in looking out for your money, but would value the added safety (hoping I would never have cause to need it) and performance over a budget option - I suppose you pay your money and take your choice. Iv'e always looked at tyres as a safety option over and above performance, especially as I get older and have the kids in the car!
I've been following
@AudiNutta s Pirelli tire thread with interest and admiration of his tenacity! Pirelli do at least seem to be interested in looking at why their tyres are failing; as a result of this i'll most likely stick with another set of the Pzeros up front when mine fail and then if there is no resolution to the 'Prielli issue' (in quotations as I understand its now not a unique to Pirelli issue on this forum...) by next tyre change time go 235/35 Ps4s all round on staggered wheels to see how that goes. As usual, just my 2p worth!