Kenny, thanks! We're happy to still have you around.
dupes, thanks! If you haven't tried it, use Pollyscale's Grimy Black for wheels. It's just about perfect for that matte off-black color of tire rubber.
Bear, thanks! You know, that's a good question. Kit seats are usually lacking in detail. For wheels that doesn't always hold true. Tamiya, Acc Min and Hasegawa kit wheels can be pretty nice.
So, it depends on resin manufacturer, the detail of the kit product, and what you find acceptable for detail on your builds. Ultracast makes great resin wheel replacements that are usually always better than the kit product. Aries, Cutting Edge (if you can find them) and True Details are more middle of the road products, IMHO. I have some Royale Resin wheels for the Revell A-10 and Tamiya F-16CJ that look really good compared to the kit offerings. I also have some Golden Dragon wheels for an F/A-18C that look average. These all add the weighted look which I like. However, True Detail wheels tend to look like the tire is flat vs. weighted.
If the weighted look isn't a detail requirement for you, I'd recommend only getting resin wheels if the kit products 1) are total drek, 2) will require considerable effort to eliminate seams in a complicated tread pattern (Mosquito!).
Hope that helps.