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I'd get the AquaClear Mini, because it doesn't cost as much money. You can price match it at PetsMart as long as you print out the online page. I think it was at PetSolutions.com or ThatPetPlace.com that had the cheapest price, around like $11-13 total. It is 100 GPH and you can fit different sorts of filter media in there too. Probably a little louder than the Fluval 2 though.
If you're going for a HOB, why not get the Penguin 125 or Mini. These go for about $12-16 at bigalsonline.com, and they come with a biowheel for great, oxygenated biofiltration