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Bought iPhoto Library Manager a few weeks ago to start archiving pictures from my main library to an external archive and it does what it says on the box.

However, I did run into one problem (iPhoto 9 updated) and it stopped working. Contacted their support people and got first class support from them. They even sent me a bit of unreleased software that they had just knocked up which sorted the problem I was having. (My problem was apparently quite singular as only a few users had had it).

So I can't say anything for the other packages you mention, but ILM in my book is a first rate bit of software.
 
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