Buying a BLDC Kit

[cksa361]

I want to get started in winding my own motors / learning about BLDC's.

Was thinking of buying some magnet wire:
http://www.gobrushless.com/shop/index.php?app=ccp0&ns=catshow&ref=magnet+wire+newbie

and a kit, either gobrushless kits or the scorpion kits:
http://www.gobrushless.com/shop/index.php?app=ccp0&ns=catshow&ref=diy+brushless+kits

http://www.gobrushless.com/shop/index.php?app=ccp0&ns=catshow&ref=Scorpion+KIT+Motors+-+22mm

Not sure which to get though. Not looking for any particular characteristic of the motor, but the lower the Kv the better (possible to get <100 Kv on these kits?). Just a decently sized one that draws a decent a mount of power. I plan to move to designing my own BLDC controller later on.

Does this sound ok?

 

[cksa361]

Also got several questions:

*For the same copper fill %, would two different windings of different turns / different wire diameter, yield the same efficiency curve for the motor?
*Why don't we have ultra-low kV motors (lots of turns, small diameter wire)? All the RC motor seem to be 200+ kV, with 2k-3k kV not uncommon?
*Why are RC motors so powerful compared to say, the brushless motor offerings from industry companies such as Maxon?

Thanks.