My buddy runs a pair of Hafler 9505 Transnovas with xlnt. success. The custom Xovers for them is an investment you should look into. Paul
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Bridging into that low impedance can stress any amplifier not rated into 2 ohms or less. Because of that low impedance and current requirements, capable tube amps are very expensive. Older SS amps, as the Carver, don't have the finesse and imaging of newer designs. Without going into a long dissertation of the sound characteristics of the various brands with "ribbons" and open woofers, a single Plinius SA250 mkIV would be my first choice. Won't be as crisp as some others but not as tight-fisted or bright either. If you like revealing speakers, don't scrimp on the rest of the system.
Dipoles don't have the reflections and room interactions but I found that softening the corners behind them improves imaging. Also, seriously consider membrane/panel traps to tighten that booming bass. Those IRS aren't prone to boom. A brute-force and relatively inexpensive DIY bass trap would be a false wall of 4X8 paneling or drywall, nailed only at the edges and dampened with mineral wool or rigid fiberglass behind but not touching.