GARAGE ELECTRICAL

Currently...
There is 14ga wire (no ground) on a 20A breaker (grrrr),
running thru 1/2" conduit - breaker is about 40ft from garage.

The garage has an opener and freezer.
There are a couple of outlets in metal boxes/conduits as well.


I'm going off this ampacity chart:
http://www.cerrowire.com/ampacity-charts


I have a few spools of 14ga THHN wire now.
I'm trying to be cheap/frugal and (re)use it if possible.


I know I'll need at least 25-30A (110V) and can be on two+ circuits.


Since I HAVE to change things, I was wondering:

1) Would it be better to just run 220V@30A using 10/3?
http://www.homedepot.com/p/Cerrowire-100-ft-10-3-NM-B-Wire-147-1803CR/202206569
Assuming that would give me two 110V@30A each circuits?

I don't have a "NEED" for 220V, but thought it might be nice for 
future expansion.

2) Just pull two or three pairs of 14ga THHN plus a ground?
(Sounds like a mofo to pull being in 1/2" conduit)


3) Something else all together?




BTW...
I have NFC, if that wasn't obvious ;)