Well, my only experience with an eclipse system was bad, but that was because what I did was completely wrong, I didn't cycle and I overstocked. Personally, I would just get a 10g tank for about 10 dollars, a heater for about 5-10 dollars, a hood and light for about 20 dollars, and a filter for about 15-20 dollars. You can do better for less.
at bigalsonline, probably the only place that beats the best price every time, the system 6 is 55 dollars. So yeah, its a bit more expensive. I'd expect to pay about 70 dollars at any petstore in the US for the same thing though, because petstores mark their products up a lot. Here's the link, so you can check it out yourself if you'd like.
I have had an Eclipse 37g for about a year now and I love it. I have not had any water problems ever. I have a little algae issue right now and I hear that is a common problem with Eclipse systems. I think I paid about $200 U.S. dollars for it.