I‘d still go with the SB15NBAC, superb midrange performance when supported by a subwoofer and way cheaper than most of the alternatives which could compete (if at all)
When I saw the R2 thread for the first time, I also immediately had the new E150HE-44 in mind, as they would allow for tremendous bass performance while keeping the small width of the top.
Either 2 of them parallel in a 22l vented enclosure (HxWxD 70x18x29 cm) or 3 of them parallel in a small...