Comfy and quiet is all relative to what you have flown before and the F-16 with an American helmet is pretty noisy, at least compared to the FJ I was used to.
Then again, if you want real comfort for long sorties you really have to have it as a design goal. To my knowledge there is only one 9G capable & agile FJ out there that you can actually get up out of your seat and go and stretch your legs.
