Overflow options for 20L - going oversized?

[musicsmaker]

I'm setting up a new tank, and have been thinking about which overflow I'd like to put on it. So far, I'm leaning towards an Eshopps Eclipse L. I'm mostly looking at the big one because I think it would look better, but also so I could reuse it when I decide to go to a larger tank.

Can anyone identify any problems I might run into going with such an oversized overflow?
Are there any other comparable options at a similar price point that I should consider?
Thanks in advance, for any input.