I just went on a test drive of a 2016 EX-L V6 and it at least felt no worse to me than the 2013 EX 4 cylinder I drove in with. So, maybe the suspension tweaks were enough to close the ride quality gap between an Accord I4 vs V6.
It was a bearable ride, but I think I will try to test drive a 2015 TLX tomorrow to see if it feels much better.
To stay in the same price range as a 2016 EX-L V6, I'll need to look at a used 2015 2.4 TLX.
It won't be a V6, but it's possible that the extra sound deadening along with Acura's 8 speed automatic will be enough to make it at least as comfortable and refined to drive as a 2016 Accord with V6.
2.4 TLX will be slower than a V6 Accord, but the reason I want the V6 Accord over the I4 Accord is for refinement, not faster 0-60 times.
The TLX has 201 HP which, along with the 8 speed automatic, will be plenty fast enough.