If you are not bothered by the treble of the 325, go with it over the 225. The 325 offers greater detail, frequency range, sound stage and build quality over the 225. If you were bothered by the treble, get the Alessandro MS2 (based on the 325 but with less strident treble) or save money by going with the 225.
I didn't hear anything unpleasant in the 325s. I'm going to be modding and woodying whatever I get too. Are the 325s worth it if I'd be modding the hell out of either?