What should do if i want to use both of my flashes outside with my 7d ?
With the 600 on the 7D you can fire/trigger the 430. If you can afford another 600, also buy the new ST-E3-RT transmitter. Sell the 430. I have three 600s and the ST-E3-RT, and it's rock solid relaiblily inside and out.
I have no experience with your third party flash units.