Hello SNS,
In reference to your desire to upgrade your DQ 10s I highly recommend
http://regnar.com
They’ve been my go to source for years for all things Dahlquist.
They’re located in upstate New York. I’m quessing that you may already be familiar with this company. But let me suggest that you go ahead with your upgrades as life is short. You can scratch those upgrades off of your “what if” list.
Enjoy the music