After much deliberation I've ordered a third refurbed 430EX from Adorama. The savings isn't what it used to be (compared to a new [url="http://www.the-digital-picture.com/Reviews/Canon-430EX-II-Speedlite-Flash-Review.aspx]430EX II[/url]) but it will be identical to my current ones for simplicity sake.
Thanks for the help ya'lls help and patience, especially Sean. Now, I guess I'll hold out for a <span style="color: #003399;"]550EX, 580EX IIfor my fourth. This may be a while seeing as I think a three light setupwill bevery capable.