Stanalee, very nice tank! Not cluttered like my tank is.
On the Seaclone, I have used one for a number of years and it has worked very well for me, consistently pulling lots of gunk out of the water in my 55gal tank (first FOWLR, now reef). The only "issue" I have had is that the foam pre-filter on the MJ1200 has to be cleaned regularly and the air valve has to be periodically adjusted. Now that my algae is under control, and I only have 5 small fish in the tank, I haven't had to do even that maintenance recently.
So yeah, if you get it at a good price I say use it but be prepared to keep an eye on it until it settles in and starts working for ya.