I also use the 228be in a duel system. I have a full fledged theater room but it is 95% music use in there…
Anyway the 228be is super easy to drive. Any good amp that is 4ohm stable will drive them so it is just depends on the sound signature you want. Personally I run a McIntosh MC462 and find it a perfect combo. It is the first system I have had that I enjoy non audiophile music on and audiophile tracks are still amazing. I have owned other amps but nothing I have enjoyed more.
If you don’t use subs I would focus on an amp that has good bass as I find the 228be a little lean in the sub bass. I use two subs so I focus on the mids, highs, and sound stage for my amp.