Much discussion in many threads on this subject. LadyStrick9 (one of our diligent regulars here) has compiled a spreadsheet full of invaluable information here:
https://docs.google.com/spreadsheet/ccc?key=0AmYrSL_FJC4NdHZUb0xvVzRrNi1Qb2NCQ0dUUVdZUmc#gid=1
I think, if it's your first rebuildable, kanthal 32 a-1 is the place to start. If you are using the Kick, it won't make much difference how many wraps you put on your coil. I use 3/4, but I probably should use 4/5, since I Kick my iHy as well. Someone can correct me if I'm wrong, but I think the higher resistance coil, all else being equal, will result in a longer battery life. Kanthal 32 will be easier to work with. Lots of folks who don't Kick their iHy's use a bigger gauge wire, or twist their wire for lower resistance and a hotter vape. This is the beauty of the iHy. You have the ability to tailor your vape to your style.