Replying to Powder Ski that can RAIL groomers ?

Hey guys,
Im 5"6 135 lbs. As I;m not a huge guy, I ski with a little bit more finesse and I can't huck around a huge burly ski. I'm 16 years old by the way. I mainly ski the west coast (BC) with a planned trip to Utah for hopefully, some POW. I mainly ski with my dad who's a guy described by his ski of choice: the Mantra.
He's an oldschool skier who loves to fly down the groomers. Now, I don't know if any of you guys waterski, but my theory is there is nothing like cutting through glass on an early morning. The same goes for skiing Powder, there truly is nothing like it.
So here's my dilemma, I want to buy a powder ski, I like the wider skis and how they just plow through crud. But, I need one that I can at least keep up to my dad on the groomers. Essentially, I'm almost looking for a POW ski "quiver-of-one," yeah, I know its a tall order. I'm only 16 so I'm not inclined to dropping money for two pairs of skis.
So, if you guys could give me a hand, Let the Ski debate battle begin.