What's your favorite "step up" size tank?

[AllFishNoBrakes]

In my experience, a bigger tank is basically the same as a smaller tank when it comes to running them. Most of my tanks were barebones sponge filters and tiny internal filtration for many years. Only over the last year did I really start playing with canisters, bigger internal filters, more flow, etc. You can run tanks on sponge filters alone, if you want to. 
 

Things just get more expensive as you get bigger. The tank itself, more plants, more fish, more dechlorinator, more fertilizer, bigger filters, etc. but it can also be done barebones and your fish should thrive. 

[johnnyxxl]

In the words of MD "more is more".