Is the isolation that much of a factor in the difference between the 2 companies though? -26dB vs -20dB
The price and the sound quality are the deciding factors at the moment.
The quads are near identical prices but as you up the driver count, you are $200-300 more expensive going 64 audio.
It's a bit of a ballache being in Scotland as well, as it would be good to try the same number of drivers in a universal fit from both manufacturers.
At the moment I'm leaning towards quads but to double the driver count with JH Audio (JH13V2) its only around an extra £200 + the bonus of adjustable bass. Worth it?