I'd go poly too, but I'd be lying if I said they are as soft as stock ones.... (stock arb rubber has more in common with chewing gum...)
Every poly bushing that is stiffer than stock adds a tiny bit of extra nvh. 1 or 2 are hardly noticeable but if you fully polybush your car, it adds up....(but that takes over 25 bushings).
On the other hand..... still no squeaks coming from my suspension (fully polybushed), so it doesnt have to be that way.
I guess it's up to the skills of the mechanic who fits them :roll: