Hi all. Been contemplating what filter will better suit my 27gal tank. Right now its got a Fluval 205 external on it and I know its just not enough grunt to get the water flowing enough. Was looking to upgrade to a Fluval 305 or even 405 but I always hear about Eheim's being very good, just so many names and codes and model numbers!! Looking at an Ecco, but they look a bit... cheap? What model would be best for a tank my size? Want some good flow, but maybe not so much that everything looks windswept. What sort of lph am i looking for? Thanks.