Best skimmer for a 55g?

[Fatman]

Are you looking for a hang-on or a sump style skimmer?

I dont know if my sump has the space for a sump style, I would prefer sump style.

This is how my wet/dry looks http://www.petsolutions.com/Pro+Clea...101877-C-.aspx

So I guess let me know if I can fit it in there.