What's The Best Power Filter?

I'm in the market for a new filter for my fancy goldfish tank... It's a 33
gallon tank, and I do plan to upgrade to a 100 gallon tank in December (so I
want a filter that I can swap-out).

I am currently running an Eclipse 3 (Marineland) filter system, and it's not
doing a great job. The water is always littered with small particles.

I have heard the Marineland HOT Magnum or the regular Magnum filters are the
best. Is this true?

The local FS has a refurbished Magnum 350 Pro on sale for 50% off ($120
Canadian, or about $95 US). It's a reputable store, and they say they have
never been used but were previously missing parts.

Thanks for any help!