Replying to Invaders? plus Binding question

Now that its time to start buying new skis, and that i have to pay for my own skis, what do people think of the line invaders? or is there another good ski that you know of for like 300 or less?

also

if i was to use the bindings from my pair of skis that i have now, and put them on the new skis, could i swap them back and forth, and keep one pair for shit conditions, and the new pair for nice conditions? or would the repeated removal and putting back on cause too much wear and tear and become dangerous?