Well... do some tweaking to have the sound that suits you coming out of the cab (what cab do you use), and then use those settings for the FX-out takes.
when i listen to the last sample you've made it sounds like there's too much presence, which explains this fizzy top-end (i had the same problem when i miked my engl stack the first time)
try lowering the presence first.
then if it still need some improvement maybe a tad less bass/gain
Presence doesn't work with impulses because it affects only the power section.
Anyway, Noumenon, Savage is not a plug and play amp like the 5150..when I bought mine I try different settings for some weeks before find a decent sound..also the 2 gain pots make the work more difficult.
Try to see which preamp tubes brand you have