you began your post with "Hell NO!!!".....
so, people were defenesive as you were expressing your opinion by claiming that their opinions were wrong, no just slightly off, but to the extent of Hell No. stop bitching.
since we obviously didn't write enough for you I'll elaborate, no that it needs to be done as there are about 50 threads on this exact topic, but whatever.
having skied Seth Pistols @ +0 and now +6, PE @ +3 and +5 and Fujative @ +7.5 I would say go for +5 or so for all mountain. The +5 PE were great all mountain. MUCH MUCH better than the Fujative mounted core center.
Skiing the fujative core center I couldn't go as fast as I wanted to comfortably and when I turned I felt like the ski tip was gonna hit me in the face or something it was so close. +7.5 was not good for all mountain. It was ok in bumps, amazing in the park, but he asked for all mountain.
the +3 and +5 mounted PE were much more able at skiing all mountain. +5 was great for skiing the park and going switch. Not as good as the fujatives, but the extra tips makes a noticable difference in the abilitly of those skis to float, bust thru crud, etc, all stuff that an all-mountain ski should do well.
So, as most have said here, +7.5 is really too much for an all mountain ski. You will lose some of the skis all mountain capabilities. They will be better in the park, but the difference between +5 or +6 and +7.5 will not be huge in the park. The extra few cm of ski to float, etc, will make a difference in pow, etc.
plus, if you really are unhappy you can always remount.
I would go +5.
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