for me:
If it was all of a sudden and i absolutely have to replace them
CRX -> Miata
IS-250 -> IS-250
RX-300 -> RX-400h
If i could wait till they are too old or break:
CRX -> i think it'll last until the CRZ comes out, or hybrid S2000, or full electric. (used as daily driver)
IS-250 -> another Lexus / Acura.
RX-300 MY2000 - I think I'll be dependable for another 5 years. Everything is good in it. Hybrid Van or 7 seat SUV.
__________________
|