What are your plans? Studio work? If so and if you have the time to set up I highly recommend setting your flashes on manual. Work on one flash at a time. Set the correct exposure for your key flash and then your fill can be 1 to 2 stops less power for starters. Once you set your exposures they will be consistent all day no matter who is in the frame. Also if you are doing studio I suggest a third flash for rim or highlight. Placed behind and to the side it highlights the hair on the back of the head, etc and gives some separation. You can a cheap manual Yongnuo for that.
So if you can describe what you will be doing we might be able to give you more tips.
To be honest I just do some stay are home indoor projects for rainy day. I got some flash triggers for my birthday and trying to get to grips with using multiflash lighting to create interesting effects.
Thanks for the notes on ETTL.
In manual mode, am I correct in thinking 1/32 on 430exII will not be the same power as 1/32 on 580exii?
5d mk iii, 60d, 70-200 2.8 is ii, 120-400, 24-70 2.8, 35L 1.4, 50 1.4, 85L 1.2 ii, 17-55 1.8, 10-20, 8mm fisheye, lensbaby, 100L macro.