Having heard the new Titan range from 505 to 808, I think there are 3 sweet spots = 505, 606 and 808
I was not that engauged by the 707, much prefered the 606 in sound - the 808’s are the finest speaker I have heard period - and when matched with NAIM electronics they just come alive - and Kudos are easy to drive
my choice is the T505 as I have limited lisening space