Replying to Should I sell my T3i and get a GH3?

What's up guys. Question time.

I currently own a Canon T3i. I'm actually fairly new to filming with DSLR, but since i've been doing video for a long time, I picked it up pretty quickly. A big part of my job is actually video, and I'd say I'm pretty good with the T3i. Not amazing, but pretty good. I've learned a bunch about how to get quality audio, I own different lenses, I've shot in all different types of light, etc. etc.

I'm wondering if I should get a GH3, though. I'm popping this question now because ski season is quickly approaching.

Honestly the main reason I'm considering it is that it shoots 1080i at 60FPS. I'm thinking this could be awesome for skiing, and really dramatic slow mo for music videos I'll probably be doing soon.

Would there be any other advantages of the GH3 over the T3i? Or would I just be dumb to sell my T3i and all the batteries and lenses just to get this camera?

Thanks