....I've been stuck and lately have decided to acquire a few Death Metal albums to expand my collection....

But I can't decide between:

Autopsy's "Severed Survival"
Morbid Angel's "Formulas Fatal To The Flesh"
Disgorge's "Parallels Of Infinite Torture"
Guttural Secrete's "Reek of Pubescent Despoilment"
or Krisiun's "Ageless Venomous"...

What do you crazy fuckers recommend the most?

99% of the replies will tell you that the choice is yours, and given our absence of knowledge about your tastes and the different albums you posted I'd be hard-pressed not to say the same. I will say though that the Autopsy album is the only one there that is an all-time death metal classic.

Buy some Incantation instead. This thread, like Andro said, is doomed from the start.