NHT will still service this system if a problem arises. And they do not charge much. Usually $165.00 to fix an issue.
I still own a system with two subwoofers. One can download Firmware upgrades and filter changes such as moving the crossover from XDW to Satellites to 135Hz. And other ways. In addition there are boundry compensation resets. Freestanding satellites, near a corner, etc.
Used these are going for under $2000.00. Occasionally $1000.00 These cannot be touched by anything in the market today for $2000.00. Yes, there are better speakers out there. But one would have to pay quite a bit more than 1000 or 2000.