Eric, I've used the 403 and 303 and liked them a lot except for the aforementioned clip issues. I have to look at the 5 series to see what they are like. I found Fluvals exceptionally reliable and well priced. Kaysie, I hear you on the Eheims. They were always the most expensive, bar none, but they too, were reliable. Glad to hear another plug for Rena as well. I like to see what's new and I do need to check them out more closely. Again, these filters are going to be for newts so I will watch the turbulence factor, although I usually try and use a spray bar at the end as it adds oxygenation and attenuates the force a bit. And I know to watch for too many microbubbles in the tank as well. It has been a while since I have been 'in the game' as it were, but having worked for a pet chain that specialized in fish for quite a few years in management really allowed me to experience hardware first hand, and I got to go to seminars and conventions by all of the famous manufacturers we have been talking about. And while I have perused the new equipment I have found that it really hasn't changed all that much in the last 15 years. I was worried that there would be some drastic changes, but it looks as if you just have more efficient filters that do the same thing. My real queries are going to be about eventual breeding anyway. I've kept newts and salamanders before with no trouble, but as I have got older I want to be less a collector and more conscious of breeding to keep captive bred stuff in the forefront and leave the wild populations be. But thanks for weighing in. You guys have had more experience with these caudates and I appreciate any wisdom handed down to me.