Replying to One last Skullcandy thread

I'm debating whether to get the TIs, the GIs, or maybe the Skullcrushers. From what I've read/heard, the TIs and GIs sometimes fit weird (gap at the top) and the Skullcrushers feel sort of delicate. Im just wondering:

1. Do the TIs and GIs cover your ear fully?
2. What are the real differences between the TI and GI?
3. I've heard the Crushers lack mid-range sounds, what exactly does that mean/how does it affect different types of music?
4. Do they come with a warranty (someone mentioned a 2 year, but there's nothing like that on the site)
5. The Skullcrushers have that in-line bass thing, does that need/suck up batteries?