Interesting question Vladimir
I was also going to mention the extra sound proofing in the ARP4 but agree with Steve, with the 4 seater it's going to make the hood very, very bulky
I find on the very few occasions when I have my 4 seater hood up ( I try not to make a habit of it) it's cosy but much louder from road noise and engine noise in the cabin
Get a sub woofer in the passenger footwell and play some music LOUD - I find a bit Gangster Rap helps to make road and engine disappear
