grates are like fuel.. either you have a taste for the more expensive ones or dont...
but the 1 diff with ss grates is longevity.. going the cheaper route, we all know the zinc coated lasted 2/ 3 years.. maybe longer if you really care for them..but they will zinc out and rust.. or if you keep them heavily seasoned with black grease coating..they can last longer if you are okay with that coating.
i personally have a taste for ss everything.. longevity and not having to clean/ or rebuy grates is a big value for me.
i dont have these grates, but do have the weber oem ss grates and paid a pretty nickel for them.. but they will pay themselves back in due time, with not having to replace the zinc coated one..
im currently in the market for craycorts this season as well.
i currently have all the grills im looking to keep/ keep as cookers and having taken a break on grill buying, now ive been buying playing with accessories.
if you want ss grates but dont want to be in the $70 range. which weber oem ss models or the one being discussed here..
check amazon for that $40 option..its marketed as 304 staineless steel and has the flip sides.. in case you continually move your bins, like i do. for indirect/ direct cook methods.