I experienced Octopre's to be realy flat and sterile sounding, with a nasty high end.
And i had allready compared it to a SPL goldmike when working with it..
Just knowing that you would probably have a way better result if your preamps would be better kinda took out the joy off recording with those things for me..
And changing the Audient to API would probably be the same thing/situation as that i described above, big difference is that Audient is still allways workable, and if your skilled you could probably get the same result out of them.. octopre's weren't for me..
Like i said.. hate them with a vengeance hahaha
You get some great stuff out of them though lasse!