Looking for a desktop replacement, how will this one fare?

I think I settled on the one I am looking for...

My price range is probably no more than 1300-1500.

http://www.amazon.com/Toshiba-X875-Q7190-17-3-Inch-Diamond-Textured-Al uminum/dp/B00AY1FGYK/ref=sr_1_1?s=pc&ie=UTF8&qid=1368339116&sr=1-1&key words=Toshiba+Qosmio

Toshiba X875-Q7190

How will this stand up to some moderate to heavy editing? I am new to the video editing world, coming from music production. I would mostly like to make simple youtube videos for man on the street stuff and work my way up to documentaries and the like, maybe around 45 mins in length or so with lots of graphics and stock footage. Will this be a good bargain for what I am looking for? I would rather it be overkill than get invested in the process of editing only to find out my computer cant cut it...

Thanks a lot you guys I am always learning more when I come here!