sndmn11
"DADDY"
As far as the 80lbs it is totally unnecessary, I know a few people that have gone that route and really regretted it, they shoot less, their form suffers from being over bowed, and due to these two things they have lost a lot of confidence in their bows.
I'd also add that they stand a better chance of having sub optimal arrow spine being close to the extreme. All of these things (can) lead to less than perfect arrow flight and a higher probability of on game terminal issues. It usually gets blamed on the broadhead or armor plated scapulas.