Buy something new from a reputable dealer. Can't go wrong with anything you mention as long as the service /support is available.
What is in your system that he drools over? Just get him something that resembles what he has seen and heard and liked and that you can help him learn to operate properly without issue.
If you think hearing loss may be a problem, consider only more efficient speaks, like Klipsch, etc. The smaller less expensive models in the Klipsch reference line cost only a few hundred and sound great even when I've heard them on fairly standard electronics at BEst Buy.
What is in your system that he drools over? Just get him something that resembles what he has seen and heard and liked and that you can help him learn to operate properly without issue.
If you think hearing loss may be a problem, consider only more efficient speaks, like Klipsch, etc. The smaller less expensive models in the Klipsch reference line cost only a few hundred and sound great even when I've heard them on fairly standard electronics at BEst Buy.