Here is a farely balanced and long winded right up of ozone. Everything you ever want to know and then some.
http://reefkeeping.com/issues/2006-03/rhf/index.php http://reefkeeping.com/issues/2006-04/rhf/index.php http://reefkeeping.com/issues/2006-05/rhf/index.php
Personally I'll take an oversized skimmer. You get the water clarity and you can peg your ORP without the added compilation.