the best advice I can give is go with the one that has the most positive feedback. I think Darin sells a lot of the Barracudas by Aqua FX on his web site (www.captivereefs.com). He carries good products and offers great support.
Some people are like slinkies...they serve no real purpose yet can still bring a smile to your face when you push them down the stairs!:p
Have a great day! Brian