Nothing MORE dangerous than a "90" chopper in the hands of a newbie.
Theyare dangerous, no matter who's doing the flying. I flew my MA gasser (G23, 13 lbs.) as a noob, just took it easy and didn't try anything stupid. I still do limited aerobatics, loops, rolls, stall-turns, but don't want to risk all the work (and $) doing piroflips and such.
Nothing more fun than bringing it out and having everybody land and watch. Just doing low passes at max speed is too much fun! [8D]
If you go with the big heli, just don't go electric. It's like kissin' your sister!