Prime Speaker Zegana EDH

I recently built this Zegana deck: http://deckbox.org/sets/403765?s=c&o=a

I'm still new to EDH, so I have no idea how effective of a deck it would be (haven't actually playtested it yet). My goal is to quickly ramp & cast big X-cost spells, as well as get lots of counters & manipulate them into card draw/other stuff. Does anyone notice any glaring issues with the deck? Or have any suggestions for other cards that would be better? There's a few things that my LGS didn't have that I still want; specifically, a few different utility lands. I'm kind of on a budget for the summer, so I can't get too extravagant with card purchases. But any kind of feedback is appreciated.