I didn't find the RTI bookshelves I mentioned in your other thread to be bright, but then again I'm a Klipsch fan, so what do I know.
I wouldn't draw any conclusions about these based on a car audio system, even from the same manufacturer. Your best bet would be to listen to them for yourself before buying if you can. Also. your receiver has a speaker calibration system that will smooth out frequency response anomalies if they exist.
Bottom line you may like them or not, you won't know until you hear them. Based on my experience I think it's unlikely you'd find them objectionable.