Fluval FX4 yes yes yes!! - took Fluval to think of a Canister that you can also use as a gravel vac - can't wait for these to arrive in the next few months...
Check out more details on our website and the videos - http://www.thetechden.com.au/Fluval_FX4_2650lph_for_aquarium_tanks_up_to_1000_l_p/pf152.htm
Definite pricing to be confirmed, but if you are interested pop your email address in on the product page to be told when they hit the shelves.