Honestly, dump the 901s. I have a pair in the attic (series VI also). I loved them 25+ years ago. But by todays standards, they just do not cut it.
For the money you are talking there are lots of great options. The last system I set up was a Naim NAT i-2 integrated and Totem Staff speakers, which match your price new and you could get them for half that used. That system will kill any Bose 901 systems.
It is time to move forward. There are lots of options of there. If you can, go to a local shop and listen to some $3K speaker and amp options. And, figure that used you can do even better.
For the money you are talking there are lots of great options. The last system I set up was a Naim NAT i-2 integrated and Totem Staff speakers, which match your price new and you could get them for half that used. That system will kill any Bose 901 systems.
It is time to move forward. There are lots of options of there. If you can, go to a local shop and listen to some $3K speaker and amp options. And, figure that used you can do even better.