"Every speaker I've ever blown was from too little power with only one exception."

So before Scott takes your advice... just how many speakers have you blown up?? hehe just kiddin!

"I have my rears crossed over at 80 Hz which is above the minimum db rating on these speakers."

That should be fine. You'll damage your ears before your speakers. Being surrounds, you'll fine they'll probably never hit their 75W max more than the rare few seconds (and I'm guessing that's the RMS rating).

And 80Hz is perfect for those speakers since it'll only make the woofers sound cleaner and more open by not having to play that deep bass at the same time as higher sounds.

And it's not a good idea to run your speakers to their F3 point anyway. What's that Klipsh ~35Hz or something like that?
1) A company might rate 'low' to look good (or rate 'in room response' without saying it). I mean how many customers test the anechoic response of the F3 point of their speakers right??
2) Typically crossing speakers an octave above is better so you get no dip before you cross into your sub.

The 950's x-over is very steep so no reason to cross your speakers lower when the sub should be non-directional and far better designed (and positioned) to play 80Hz and below.