Did your BIL by chance use several of these speakers and wire them in parallel? (He should know this, if you don’t.) If he did, then the problem is that the total impedance of the speakers is too low. Three 8-ohm speakers in parallel will present a load of about 2.7 ohms, which is very bad for most receivers. They are designed for 4 to 8 ohms (two speakers or a single speaker) on each channel. More than three speakers on a single channel is very, very bad.
There are ways around this, but I won’t go into details unless this is actually the cause of his problem.
More power won’t help if the impedance is too low. Some (but not many) power amplifiers are designed to handle low impedances, but receivers generally are not.
As to your original question, I tend to use Yamaha receivers, but there are several different series (casual use up to very good quality) and you have to select one carefully based on need. But a good quality Onkyo or other brand would work just fine as long as your BIL doesn’t wire too many speakers to the outputs.