I think we ended up confusing the OP...
The final/short/cheap solution is to use the 580EX with a cord as a master and set off your 480EX remotely. This will give you both manual and auto modes, as well as giving you ETTL.
Anything beyound that you will have to give up something for the distance/non-local flash use.
A typical example of a wedding shot. On a beach, you have the couple go out to a set of rock 30-40 feet away, but they're in shadow and you need a light source, you can't use a reflector (wide shot) you can't use a local flash, you need to be able to hide a flash near them and set it off. This requires one of the solutions from above (non-line-of-site solution).
I hope that clears up some of the confusion.
If you want something cheaper, the ST-E2 plus the 430EX would be cheaper than the 580EX II plus the OC-E3 cord and probably a little more versatile as far as off-camera flash placement is concerned. But, having said that, I would still opt for the 580EX II in lieu of the ST-E2 and the 430EX but that's just me and what I'd use the flashes for. 

