Not a lot of coilovers are engineered for a 2-3" drop (due to the negative consequences mentioned above), but you're already looking at some of the few brands that do. So if you're dead set on going that low...
The RS-R Black-i have had favourable reviews on this platform (not to be confused with their Sports-i model, which is the more performance-oriented/moderate lowering model). And rather than typical pillowball top mounts, they use urethane bushings in their top mounts, so they probably have less NVH than the others. They're made in Japan, always had a good reputation, and been around since the 1980's.
Some reviews on this platform:
https://www.ft86club.com/forums/showthread.php?t=49980
https://www.ft86club.com/forums/show....php?p=1120073
https://www.ft86club.com/forums/show....php?p=1423221
The Fortune Auto SuperLow Spec comes with Swift springs as standard...unless you're looking at the regular 500 Series. The 500 Series they may not achieve the 2-3" drop you're looking for (I've read they don't go very low on this platform). However, the SuperLow Spec seems to be new, haven't seen any reviews about them...
I briefly researched Silvers Neomax in the past and also didn't find any reviews for this platform. Only found reviews on other platforms and that they're made in Taiwan (probably by BC Racing as mentioned above). I also recall reading somewhere that they are a supplier for Fortune Auto.
Due to the lack of experience/reviews of Silvers Neomax on this platform, you might be the guinea pig too if you go this route. And worth contacting them to see if their standard kit can even lower this platform 2-3". And their site doesn't mention what the "Super Low Kit" option entails, so probably worth asking about that too.
Whether Swift springs are worth the upgrade are subjective on a car that doesn't see a track/hard driving...maybe if you're keeping the car/coilovers long-term? They've got a reputation for maintaining consistent spring rates and performance (reaction speeds and travel).