You think a better precision bearing class is worthwhile?
Like back in the day, the better ABEC rating on skate bearings really made them much faster/smooth than the regular shit.
I'm sure precision or REM polished bearings would be better than stock but ceramic bearings are amazing. We ran them in all 4 Winters hubs and for all the bearings in the quick change rear end on our circle track cars and the difference was nothing short of amazing. The car would roll 1000X easier when we pushed it around the pits and would coast forever through the pits when we pulled off the track. I'm a cheap motherfucker when it comes to spending money on unnecessary parts but ceramic bearings are 100% worth whatever they cost performance wise.