I have an heavy stocked 125g cichlid tank and am using multiple types of filters. IMO a good idea
AC110 -love AquaClears >paid $45
fluval405 canister -love these too >paid about $140
small homemade wet/dry to hide equipment -best of all worlds! >priceless (LOL)
The AC and a canister is a good place to start. Like what was already said, depends on the amount/kind of fish.
P.S. try doing a search on this topic. there have been lots of great threads already fully discussing this. Lots of great feed backs on the different brands that you want to know about. There are a lot of cool, helpful fish people on this site. WELCOME.