External Aquarium Filters

I have a 2 1/2 inch RES in a 30 gallon tank with about 3-4 gallons of water (ill post a vid) living with some feeder fish.... i have tried the decorative filter from tetrafonda and it failed miserably. T~T I need someone to recommend a good filter like i know it has to have 3 way filtration and carbon media but im having trouble finding one worth the price ( im pretty poor) but if it works im willing to pay good money. I was thinking one of these filters:
EHEIM Ecco External Canister Filters

http://www.petco.com/Shop/Product.aspx?sku=485543

I like this one and its cheaper but is it any good??
Marineland Magnum 350 Dual Purpose Canister Filter

http://www.petco.com/Shop/Product.aspx?sku=157180

I really love this one i think it is perfect but the price literally scares me o.0

so im sorry i ask stupid questions at times but this is my pet i want the best for it.
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