I had the 228Be and my favorite amp with those speakers was the NAD M23. The similar integrated is the M33. These are class D amps.
I’ve owned a lot of amplifiers, including tube, class A and class AB Luxman integrateds, and a lot more, and normally would not recommend a class D amplifier. There are some good ones out there but most never really sounded musical for me. This NAD/Revel combo however is very good. I haven’t heard Hegel but it’s also probably a great recommendation. Revel speakers are clear and accurate and musical in that way. A clean/clear, powerful amplifier mates well with them. The Luxman are good but may not pair well with them.
Lastly, in that off shaped and large room you might really find great benefit from some room acoustical manipulation (that is, DSP) which the NAD has excellent software in DIRAC.