I spent the day digging through the internet on the differences between hub motors, and i'm pretty sure I want a geared hub.

The bike path i'll be riding has a couple of steep hills, so i'll be doing a E-Bike kit, most likely the geared type, as I don't want to have the extra drag for most of the ride, just for the sake of a couple of hills.

Questions:

Is the 48v-52v 1,000 watt range available in a geared hub?

Can the geared hubs accommodate a disc brake as well as normal cassette?

I'm 6'2" @240lbs. Will a geared hub be able to pull me up a fairly steep hill of @1/4 mile long? This hill comes at the end of my ride, when I simply don't have the steam to even do part of the hill.

Are there any super high output gearless motors like hi-powerbikes has, that don't have any perceivable drag? Their bikes are so high output that it would seem that you would definitely feel the magnets pulling against you.

Oh, and i'm hoping to find a complete kit for whichever way I go.
Also, this is going on a cross tour GT mountain bike.

Robert