Do you want an internal or external filter? Internal goes inside the aquarium, external goes outside, usually inside a cabinet which the tank sits on. If you have the space and money, external does look nicer and you can get a bigger one that has better flow and capacity for keeping the water clean, but internal still works great and is much cheaper.
I have an Eheim Classic 250 external filter on my 60L and I am very happy with it. I use lily pipes on the inflow/outflow pipes so it looks more beautiful.
If you want internal, before that I used an Eheim Pickup60, it worked really well, I only swapped over for the aesthetics. I still use it on my quarantine tank.