I can attest that I've missed more than a couple shots at game because I was fiddling with an adjustable scope or cranked the mag. up way too high for a particular shot.
A couple years ago I used my dad's 1964 Model 70 .270 Featherweight on a whitetail hunt. It has a fixed 4x scope and I kinda liked the simplicity. It seemed adequate for anything in reasonable range for the rifle.
I'm not one of the buttheads that glasses game with a high power scope anyway. I use the binos for that.
Get what you like. /ubbthreads/images/graemlins/wink.gif