I own RSIIb's as my main speakers. They have more drivers than the 2.5's so take this with a grain of salt, but I find that a slight toe-in works best - I cross the tweeters a couple feet behind my listening position.
If you intend to keep them you should look into the new EMIM diaphragms offered by Apogee Acoustics in Australia - I have them and they sound incredible, like an electrostatic with 10X the dynamic range.
If you intend to keep them you should look into the new EMIM diaphragms offered by Apogee Acoustics in Australia - I have them and they sound incredible, like an electrostatic with 10X the dynamic range.