I dunno...... what did I do?
Several factos mike.
1) whats your price range Mike?
2) do you need internal or external?
3) how much room do you have?
If your price range is in the 1000-1500 range, you need to do external, and you can fit the skimmer beside your sump - GO REEFLO.
If your price range is in the 2000 range, you need internal, and you have no room, go BK.
I just got my orca 250 and this skimmer really rock. if i had more time, I would have posted a thread about my orca 250. but time is not what I have right now.
On the 250, there is a direct drain from the bottom of the collection cup. you can decide how to drain it off and I would recommend draining into another container that can overflow back into your sump. this is to prevent overflow which i've heard is inevitable as your skimmer is breaking in for the first 2-6 weeks. it will avoid the "suddenly my skimmer went crazy and i flooded my living room" scenario.