Hey there Gang. Question... I have a speedlite 430 ex ii which has been great for me and for Christmas to myself I got a NEW 580 EX ii to use on my 60D. question should I have just spent the extra $ for the 600 or did I do ok just going to the 580?
I know there is a NEW 430 replacement coming in 2013. Just having post purchase 2nd thoughts..
Bury the buyer's remorse. What's done is done.
With your 60D you can remotely control both the 430EXII and 580EXII off camera without any additional purchases, using the camera's infrared controller. With the 600EX-RT, you could do the same thing, but you'd be paying extra money for radio control that you can't use at all with your 430EXII and can't use with the 60D without buying the $300 transmitter from Canon.
Infrared has a shorter range and must be line-of-sight, but I've found in real world use that is almost never a problem (just be sure you point the strobe's IR sensor in the general direction of the camera).
You'll be amazed at how much you can do and learn with two strobes off-camera. Now you can start collecting light modifiers (umbrellas, soft boxes, etc. etc.). If and when you reach the point where you really need radio control, you can either sell the 580 and 430 or invest in a third-party trigger.