Is it an RSX Type-S or standard?
If it is a standard RSX, then the Civic Si and the RSX actually have the same amount of horsepower (160 hp). They are mechanically similar, but the RSX looks better.
100k miles is not too many; I have seen these cars reach 200-250k mi before needing major...
I read somewhere that the engineers intended the 2005 & 2006 models to be quieter on the road than the earlier models. Does anyone know about this or have personal experience?
Any other personal thoughts about whether I should focus on the earlier or later generations will be appreciated!